blob: 3c0256962f7dafa4ee3b11d69aed963822c888c2 [file] [log] [blame]
Per Lidenb97bf3f2006-01-02 19:04:38 +01001/*
2 * net/tipc/socket.c: TIPC socket API
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09003 *
Jon Paul Maloy8826cde2014-03-12 11:31:09 -04004 * Copyright (c) 2001-2007, 2012-2014, Ericsson AB
Ying Xuec5fa7b32013-06-17 10:54:39 -04005 * Copyright (c) 2004-2008, 2010-2013, Wind River Systems
Per Lidenb97bf3f2006-01-02 19:04:38 +01006 * All rights reserved.
7 *
Per Liden9ea1fd32006-01-11 13:30:43 +01008 * Redistribution and use in source and binary forms, with or without
Per Lidenb97bf3f2006-01-02 19:04:38 +01009 * modification, are permitted provided that the following conditions are met:
10 *
Per Liden9ea1fd32006-01-11 13:30:43 +010011 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the names of the copyright holders nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
Per Lidenb97bf3f2006-01-02 19:04:38 +010019 *
Per Liden9ea1fd32006-01-11 13:30:43 +010020 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
Per Lidenb97bf3f2006-01-02 19:04:38 +010034 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
Per Lidenb97bf3f2006-01-02 19:04:38 +010037#include "core.h"
Allan Stephensd265fef2010-11-30 12:00:53 +000038#include "port.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010039
Erik Hugne2cf8aa12012-06-29 00:16:37 -040040#include <linux/export.h>
Erik Hugne2cf8aa12012-06-29 00:16:37 -040041
Per Lidenb97bf3f2006-01-02 19:04:38 +010042#define SS_LISTENING -1 /* socket is listening */
43#define SS_READY -2 /* socket is connectionless */
44
Allan Stephens3654ea02008-04-13 21:35:11 -070045#define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */
Per Lidenb97bf3f2006-01-02 19:04:38 +010046
Allan Stephens0c3141e2008-04-15 00:22:02 -070047static int backlog_rcv(struct sock *sk, struct sk_buff *skb);
David S. Miller676d2362014-04-11 16:15:36 -040048static void tipc_data_ready(struct sock *sk);
Ying Xuef288bef2012-08-21 11:16:57 +080049static void tipc_write_space(struct sock *sk);
Ying Xue247f0f32014-02-18 16:06:46 +080050static int tipc_release(struct socket *sock);
51static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags);
Per Lidenb97bf3f2006-01-02 19:04:38 +010052
Florian Westphalbca65ea2008-02-07 18:18:01 -080053static const struct proto_ops packet_ops;
54static const struct proto_ops stream_ops;
55static const struct proto_ops msg_ops;
Per Lidenb97bf3f2006-01-02 19:04:38 +010056
57static struct proto tipc_proto;
Ying Xuec5fa7b32013-06-17 10:54:39 -040058static struct proto tipc_proto_kern;
Per Lidenb97bf3f2006-01-02 19:04:38 +010059
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +090060/*
Allan Stephens0c3141e2008-04-15 00:22:02 -070061 * Revised TIPC socket locking policy:
62 *
63 * Most socket operations take the standard socket lock when they start
64 * and hold it until they finish (or until they need to sleep). Acquiring
65 * this lock grants the owner exclusive access to the fields of the socket
66 * data structures, with the exception of the backlog queue. A few socket
67 * operations can be done without taking the socket lock because they only
68 * read socket information that never changes during the life of the socket.
69 *
70 * Socket operations may acquire the lock for the associated TIPC port if they
71 * need to perform an operation on the port. If any routine needs to acquire
72 * both the socket lock and the port lock it must take the socket lock first
73 * to avoid the risk of deadlock.
74 *
75 * The dispatcher handling incoming messages cannot grab the socket lock in
76 * the standard fashion, since invoked it runs at the BH level and cannot block.
77 * Instead, it checks to see if the socket lock is currently owned by someone,
78 * and either handles the message itself or adds it to the socket's backlog
79 * queue; in the latter case the queued message is processed once the process
80 * owning the socket lock releases it.
81 *
82 * NOTE: Releasing the socket lock while an operation is sleeping overcomes
83 * the problem of a blocked socket operation preventing any other operations
84 * from occurring. However, applications must be careful if they have
85 * multiple threads trying to send (or receive) on the same socket, as these
86 * operations might interfere with each other. For example, doing a connect
87 * and a receive at the same time might allow the receive to consume the
88 * ACK message meant for the connect. While additional work could be done
89 * to try and overcome this, it doesn't seem to be worthwhile at the present.
90 *
91 * NOTE: Releasing the socket lock while an operation is sleeping also ensures
92 * that another operation that must be performed in a non-blocking manner is
93 * not delayed for very long because the lock has already been taken.
94 *
95 * NOTE: This code assumes that certain fields of a port/socket pair are
96 * constant over its lifetime; such fields can be examined without taking
97 * the socket lock and/or port lock, and do not need to be re-read even
98 * after resuming processing after waiting. These fields include:
99 * - socket type
100 * - pointer to socket sk structure (aka tipc_sock structure)
101 * - pointer to port structure
102 * - port reference
Per Lidenb97bf3f2006-01-02 19:04:38 +0100103 */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100104
Jon Paul Maloy8826cde2014-03-12 11:31:09 -0400105#include "socket.h"
106
Per Lidenb97bf3f2006-01-02 19:04:38 +0100107/**
Allan Stephens0c3141e2008-04-15 00:22:02 -0700108 * advance_rx_queue - discard first buffer in socket receive queue
109 *
110 * Caller must hold socket lock
Per Lidenb97bf3f2006-01-02 19:04:38 +0100111 */
Allan Stephens0c3141e2008-04-15 00:22:02 -0700112static void advance_rx_queue(struct sock *sk)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100113{
Allan Stephens5f6d9122011-11-04 13:24:29 -0400114 kfree_skb(__skb_dequeue(&sk->sk_receive_queue));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100115}
116
117/**
Allan Stephens0c3141e2008-04-15 00:22:02 -0700118 * reject_rx_queue - reject all buffers in socket receive queue
119 *
120 * Caller must hold socket lock
121 */
Allan Stephens0c3141e2008-04-15 00:22:02 -0700122static void reject_rx_queue(struct sock *sk)
123{
124 struct sk_buff *buf;
125
Ying Xue9da3d472012-11-27 06:15:27 -0500126 while ((buf = __skb_dequeue(&sk->sk_receive_queue)))
Allan Stephens0c3141e2008-04-15 00:22:02 -0700127 tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
Allan Stephens0c3141e2008-04-15 00:22:02 -0700128}
129
130/**
Ying Xuec5fa7b32013-06-17 10:54:39 -0400131 * tipc_sk_create - create a TIPC socket
Allan Stephens0c3141e2008-04-15 00:22:02 -0700132 * @net: network namespace (must be default network)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100133 * @sock: pre-allocated socket structure
134 * @protocol: protocol indicator (must be 0)
Eric Paris3f378b62009-11-05 22:18:14 -0800135 * @kern: caused by kernel or by userspace?
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900136 *
Allan Stephens0c3141e2008-04-15 00:22:02 -0700137 * This routine creates additional data structures used by the TIPC socket,
138 * initializes them, and links them together.
Per Lidenb97bf3f2006-01-02 19:04:38 +0100139 *
140 * Returns 0 on success, errno otherwise
141 */
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400142static int tipc_sk_create(struct net *net, struct socket *sock,
143 int protocol, int kern)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100144{
Allan Stephens0c3141e2008-04-15 00:22:02 -0700145 const struct proto_ops *ops;
146 socket_state state;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100147 struct sock *sk;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400148 struct tipc_sock *tsk;
149 struct tipc_port *port;
150 u32 ref;
Allan Stephens0c3141e2008-04-15 00:22:02 -0700151
152 /* Validate arguments */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100153 if (unlikely(protocol != 0))
154 return -EPROTONOSUPPORT;
155
Per Lidenb97bf3f2006-01-02 19:04:38 +0100156 switch (sock->type) {
157 case SOCK_STREAM:
Allan Stephens0c3141e2008-04-15 00:22:02 -0700158 ops = &stream_ops;
159 state = SS_UNCONNECTED;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100160 break;
161 case SOCK_SEQPACKET:
Allan Stephens0c3141e2008-04-15 00:22:02 -0700162 ops = &packet_ops;
163 state = SS_UNCONNECTED;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100164 break;
165 case SOCK_DGRAM:
Per Lidenb97bf3f2006-01-02 19:04:38 +0100166 case SOCK_RDM:
Allan Stephens0c3141e2008-04-15 00:22:02 -0700167 ops = &msg_ops;
168 state = SS_READY;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100169 break;
Allan Stephens49978652006-06-25 23:47:18 -0700170 default:
Allan Stephens49978652006-06-25 23:47:18 -0700171 return -EPROTOTYPE;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100172 }
173
Allan Stephens0c3141e2008-04-15 00:22:02 -0700174 /* Allocate socket's protocol area */
Ying Xuec5fa7b32013-06-17 10:54:39 -0400175 if (!kern)
176 sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto);
177 else
178 sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto_kern);
179
Allan Stephens0c3141e2008-04-15 00:22:02 -0700180 if (sk == NULL)
181 return -ENOMEM;
182
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400183 tsk = tipc_sk(sk);
184 port = &tsk->port;
185
186 ref = tipc_port_init(port, TIPC_LOW_IMPORTANCE);
187 if (!ref) {
188 pr_warn("Socket registration failed, ref. table exhausted\n");
Allan Stephens0c3141e2008-04-15 00:22:02 -0700189 sk_free(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100190 return -ENOMEM;
191 }
192
Allan Stephens0c3141e2008-04-15 00:22:02 -0700193 /* Finish initializing socket data structures */
Allan Stephens0c3141e2008-04-15 00:22:02 -0700194 sock->ops = ops;
195 sock->state = state;
196
Per Lidenb97bf3f2006-01-02 19:04:38 +0100197 sock_init_data(sock, sk);
Allan Stephens0c3141e2008-04-15 00:22:02 -0700198 sk->sk_backlog_rcv = backlog_rcv;
Ying Xuecc79dd12013-06-17 10:54:37 -0400199 sk->sk_rcvbuf = sysctl_tipc_rmem[1];
Ying Xuef288bef2012-08-21 11:16:57 +0800200 sk->sk_data_ready = tipc_data_ready;
201 sk->sk_write_space = tipc_write_space;
Allan Stephensa0f40f02011-05-26 13:44:34 -0400202 tipc_sk(sk)->conn_timeout = CONN_TIMEOUT_DEFAULT;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400203 tipc_port_unlock(port);
Allan Stephens7ef43eb2008-05-12 15:42:28 -0700204
Allan Stephens0c3141e2008-04-15 00:22:02 -0700205 if (sock->state == SS_READY) {
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400206 tipc_port_set_unreturnable(port, true);
Allan Stephens0c3141e2008-04-15 00:22:02 -0700207 if (sock->type == SOCK_DGRAM)
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400208 tipc_port_set_unreliable(port, true);
Allan Stephens0c3141e2008-04-15 00:22:02 -0700209 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100210 return 0;
211}
212
213/**
Ying Xuec5fa7b32013-06-17 10:54:39 -0400214 * tipc_sock_create_local - create TIPC socket from inside TIPC module
215 * @type: socket type - SOCK_RDM or SOCK_SEQPACKET
216 *
217 * We cannot use sock_creat_kern here because it bumps module user count.
218 * Since socket owner and creator is the same module we must make sure
219 * that module count remains zero for module local sockets, otherwise
220 * we cannot do rmmod.
221 *
222 * Returns 0 on success, errno otherwise
223 */
224int tipc_sock_create_local(int type, struct socket **res)
225{
226 int rc;
Ying Xuec5fa7b32013-06-17 10:54:39 -0400227
228 rc = sock_create_lite(AF_TIPC, type, 0, res);
229 if (rc < 0) {
230 pr_err("Failed to create kernel socket\n");
231 return rc;
232 }
233 tipc_sk_create(&init_net, *res, 0, 1);
234
Ying Xuec5fa7b32013-06-17 10:54:39 -0400235 return 0;
236}
237
238/**
239 * tipc_sock_release_local - release socket created by tipc_sock_create_local
240 * @sock: the socket to be released.
241 *
242 * Module reference count is not incremented when such sockets are created,
243 * so we must keep it from being decremented when they are released.
244 */
245void tipc_sock_release_local(struct socket *sock)
246{
Ying Xue247f0f32014-02-18 16:06:46 +0800247 tipc_release(sock);
Ying Xuec5fa7b32013-06-17 10:54:39 -0400248 sock->ops = NULL;
249 sock_release(sock);
250}
251
252/**
253 * tipc_sock_accept_local - accept a connection on a socket created
254 * with tipc_sock_create_local. Use this function to avoid that
255 * module reference count is inadvertently incremented.
256 *
257 * @sock: the accepting socket
258 * @newsock: reference to the new socket to be created
259 * @flags: socket flags
260 */
261
262int tipc_sock_accept_local(struct socket *sock, struct socket **newsock,
Paul Gortmakerae8509c2013-06-17 10:54:47 -0400263 int flags)
Ying Xuec5fa7b32013-06-17 10:54:39 -0400264{
265 struct sock *sk = sock->sk;
266 int ret;
267
268 ret = sock_create_lite(sk->sk_family, sk->sk_type,
269 sk->sk_protocol, newsock);
270 if (ret < 0)
271 return ret;
272
Ying Xue247f0f32014-02-18 16:06:46 +0800273 ret = tipc_accept(sock, *newsock, flags);
Ying Xuec5fa7b32013-06-17 10:54:39 -0400274 if (ret < 0) {
275 sock_release(*newsock);
276 return ret;
277 }
278 (*newsock)->ops = sock->ops;
279 return ret;
280}
281
282/**
Ying Xue247f0f32014-02-18 16:06:46 +0800283 * tipc_release - destroy a TIPC socket
Per Lidenb97bf3f2006-01-02 19:04:38 +0100284 * @sock: socket to destroy
285 *
286 * This routine cleans up any messages that are still queued on the socket.
287 * For DGRAM and RDM socket types, all queued messages are rejected.
288 * For SEQPACKET and STREAM socket types, the first message is rejected
289 * and any others are discarded. (If the first message on a STREAM socket
290 * is partially-read, it is discarded and the next one is rejected instead.)
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900291 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100292 * NOTE: Rejected messages are not necessarily returned to the sender! They
293 * are returned or discarded according to the "destination droppable" setting
294 * specified for the message by the sender.
295 *
296 * Returns 0 on success, errno otherwise
297 */
Ying Xue247f0f32014-02-18 16:06:46 +0800298static int tipc_release(struct socket *sock)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100299{
Per Lidenb97bf3f2006-01-02 19:04:38 +0100300 struct sock *sk = sock->sk;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400301 struct tipc_sock *tsk;
302 struct tipc_port *port;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100303 struct sk_buff *buf;
304
Allan Stephens0c3141e2008-04-15 00:22:02 -0700305 /*
306 * Exit if socket isn't fully initialized (occurs when a failed accept()
307 * releases a pre-allocated child socket that was never used)
308 */
Allan Stephens0c3141e2008-04-15 00:22:02 -0700309 if (sk == NULL)
310 return 0;
311
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400312 tsk = tipc_sk(sk);
313 port = &tsk->port;
Allan Stephens0c3141e2008-04-15 00:22:02 -0700314 lock_sock(sk);
315
316 /*
317 * Reject all unreceived messages, except on an active connection
318 * (which disconnects locally & sends a 'FIN+' to peer)
319 */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100320 while (sock->state != SS_DISCONNECTING) {
Allan Stephens0c3141e2008-04-15 00:22:02 -0700321 buf = __skb_dequeue(&sk->sk_receive_queue);
322 if (buf == NULL)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100323 break;
Ying Xue40682432013-10-18 07:23:16 +0200324 if (TIPC_SKB_CB(buf)->handle != NULL)
Allan Stephens5f6d9122011-11-04 13:24:29 -0400325 kfree_skb(buf);
Allan Stephens0c3141e2008-04-15 00:22:02 -0700326 else {
327 if ((sock->state == SS_CONNECTING) ||
328 (sock->state == SS_CONNECTED)) {
329 sock->state = SS_DISCONNECTING;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400330 tipc_port_disconnect(port->ref);
Allan Stephens0c3141e2008-04-15 00:22:02 -0700331 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100332 tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
Allan Stephens0c3141e2008-04-15 00:22:02 -0700333 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100334 }
335
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400336 /* Destroy TIPC port; also disconnects an active connection and
337 * sends a 'FIN-' to peer.
Allan Stephens0c3141e2008-04-15 00:22:02 -0700338 */
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400339 tipc_port_destroy(port);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100340
Allan Stephens0c3141e2008-04-15 00:22:02 -0700341 /* Discard any remaining (connection-based) messages in receive queue */
Ying Xue57467e52013-01-20 23:30:08 +0100342 __skb_queue_purge(&sk->sk_receive_queue);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100343
Allan Stephens0c3141e2008-04-15 00:22:02 -0700344 /* Reject any messages that accumulated in backlog queue */
Allan Stephens0c3141e2008-04-15 00:22:02 -0700345 sock->state = SS_DISCONNECTING;
346 release_sock(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100347
348 sock_put(sk);
Allan Stephens0c3141e2008-04-15 00:22:02 -0700349 sock->sk = NULL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100350
Geert Uytterhoeven065d7e32014-04-06 15:56:14 +0200351 return 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100352}
353
354/**
Ying Xue247f0f32014-02-18 16:06:46 +0800355 * tipc_bind - associate or disassocate TIPC name(s) with a socket
Per Lidenb97bf3f2006-01-02 19:04:38 +0100356 * @sock: socket structure
357 * @uaddr: socket address describing name(s) and desired operation
358 * @uaddr_len: size of socket address data structure
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900359 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100360 * Name and name sequence binding is indicated using a positive scope value;
361 * a negative scope value unbinds the specified name. Specifying no name
362 * (i.e. a socket address length of 0) unbinds all names from the socket.
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900363 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100364 * Returns 0 on success, errno otherwise
Allan Stephens0c3141e2008-04-15 00:22:02 -0700365 *
366 * NOTE: This routine doesn't need to take the socket lock since it doesn't
367 * access any non-constant socket information.
Per Lidenb97bf3f2006-01-02 19:04:38 +0100368 */
Ying Xue247f0f32014-02-18 16:06:46 +0800369static int tipc_bind(struct socket *sock, struct sockaddr *uaddr,
370 int uaddr_len)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100371{
Ying Xue84602762013-12-27 10:18:28 +0800372 struct sock *sk = sock->sk;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100373 struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400374 struct tipc_sock *tsk = tipc_sk(sk);
Ying Xue84602762013-12-27 10:18:28 +0800375 int res = -EINVAL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100376
Ying Xue84602762013-12-27 10:18:28 +0800377 lock_sock(sk);
378 if (unlikely(!uaddr_len)) {
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400379 res = tipc_withdraw(&tsk->port, 0, NULL);
Ying Xue84602762013-12-27 10:18:28 +0800380 goto exit;
381 }
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900382
Ying Xue84602762013-12-27 10:18:28 +0800383 if (uaddr_len < sizeof(struct sockaddr_tipc)) {
384 res = -EINVAL;
385 goto exit;
386 }
387 if (addr->family != AF_TIPC) {
388 res = -EAFNOSUPPORT;
389 goto exit;
390 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100391
Per Lidenb97bf3f2006-01-02 19:04:38 +0100392 if (addr->addrtype == TIPC_ADDR_NAME)
393 addr->addr.nameseq.upper = addr->addr.nameseq.lower;
Ying Xue84602762013-12-27 10:18:28 +0800394 else if (addr->addrtype != TIPC_ADDR_NAMESEQ) {
395 res = -EAFNOSUPPORT;
396 goto exit;
397 }
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900398
Ying Xue13a2e892013-06-17 10:54:40 -0400399 if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) &&
Ying Xue7d0ab172013-06-17 10:54:41 -0400400 (addr->addr.nameseq.type != TIPC_TOP_SRV) &&
Ying Xue84602762013-12-27 10:18:28 +0800401 (addr->addr.nameseq.type != TIPC_CFG_SRV)) {
402 res = -EACCES;
403 goto exit;
404 }
Allan Stephensc422f1b2011-11-02 15:49:40 -0400405
Ying Xue84602762013-12-27 10:18:28 +0800406 res = (addr->scope > 0) ?
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400407 tipc_publish(&tsk->port, addr->scope, &addr->addr.nameseq) :
408 tipc_withdraw(&tsk->port, -addr->scope, &addr->addr.nameseq);
Ying Xue84602762013-12-27 10:18:28 +0800409exit:
410 release_sock(sk);
411 return res;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100412}
413
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900414/**
Ying Xue247f0f32014-02-18 16:06:46 +0800415 * tipc_getname - get port ID of socket or peer socket
Per Lidenb97bf3f2006-01-02 19:04:38 +0100416 * @sock: socket structure
417 * @uaddr: area for returned socket address
418 * @uaddr_len: area for returned length of socket address
Allan Stephens2da59912008-07-14 22:43:32 -0700419 * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900420 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100421 * Returns 0 on success, errno otherwise
Allan Stephens0c3141e2008-04-15 00:22:02 -0700422 *
Allan Stephens2da59912008-07-14 22:43:32 -0700423 * NOTE: This routine doesn't need to take the socket lock since it only
424 * accesses socket information that is unchanging (or which changes in
Allan Stephens0e659672010-12-31 18:59:32 +0000425 * a completely predictable manner).
Per Lidenb97bf3f2006-01-02 19:04:38 +0100426 */
Ying Xue247f0f32014-02-18 16:06:46 +0800427static int tipc_getname(struct socket *sock, struct sockaddr *uaddr,
428 int *uaddr_len, int peer)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100429{
Per Lidenb97bf3f2006-01-02 19:04:38 +0100430 struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400431 struct tipc_sock *tsk = tipc_sk(sock->sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100432
Kulikov Vasiliy88f8a5e2010-10-31 07:10:32 +0000433 memset(addr, 0, sizeof(*addr));
Allan Stephens0c3141e2008-04-15 00:22:02 -0700434 if (peer) {
Allan Stephens2da59912008-07-14 22:43:32 -0700435 if ((sock->state != SS_CONNECTED) &&
436 ((peer != 2) || (sock->state != SS_DISCONNECTING)))
437 return -ENOTCONN;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400438 addr->addr.id.ref = tipc_port_peerport(&tsk->port);
439 addr->addr.id.node = tipc_port_peernode(&tsk->port);
Allan Stephens0c3141e2008-04-15 00:22:02 -0700440 } else {
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400441 addr->addr.id.ref = tsk->port.ref;
Allan Stephensb924dcf2010-11-30 12:01:03 +0000442 addr->addr.id.node = tipc_own_addr;
Allan Stephens0c3141e2008-04-15 00:22:02 -0700443 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100444
445 *uaddr_len = sizeof(*addr);
446 addr->addrtype = TIPC_ADDR_ID;
447 addr->family = AF_TIPC;
448 addr->scope = 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100449 addr->addr.name.domain = 0;
450
Allan Stephens0c3141e2008-04-15 00:22:02 -0700451 return 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100452}
453
454/**
Ying Xue247f0f32014-02-18 16:06:46 +0800455 * tipc_poll - read and possibly block on pollmask
Per Lidenb97bf3f2006-01-02 19:04:38 +0100456 * @file: file structure associated with the socket
457 * @sock: socket for which to calculate the poll bits
458 * @wait: ???
459 *
Allan Stephens9b674e82008-03-26 16:48:21 -0700460 * Returns pollmask value
461 *
462 * COMMENTARY:
463 * It appears that the usual socket locking mechanisms are not useful here
464 * since the pollmask info is potentially out-of-date the moment this routine
465 * exits. TCP and other protocols seem to rely on higher level poll routines
466 * to handle any preventable race conditions, so TIPC will do the same ...
467 *
468 * TIPC sets the returned events as follows:
Allan Stephens9b674e82008-03-26 16:48:21 -0700469 *
Allan Stephensf662c072010-08-17 11:00:06 +0000470 * socket state flags set
471 * ------------ ---------
472 * unconnected no read flags
Erik Hugnec4fc2982012-10-16 16:47:06 +0200473 * POLLOUT if port is not congested
Allan Stephensf662c072010-08-17 11:00:06 +0000474 *
475 * connecting POLLIN/POLLRDNORM if ACK/NACK in rx queue
476 * no write flags
477 *
478 * connected POLLIN/POLLRDNORM if data in rx queue
479 * POLLOUT if port is not congested
480 *
481 * disconnecting POLLIN/POLLRDNORM/POLLHUP
482 * no write flags
483 *
484 * listening POLLIN if SYN in rx queue
485 * no write flags
486 *
487 * ready POLLIN/POLLRDNORM if data in rx queue
488 * [connectionless] POLLOUT (since port cannot be congested)
489 *
490 * IMPORTANT: The fact that a read or write operation is indicated does NOT
491 * imply that the operation will succeed, merely that it should be performed
492 * and will not block.
Per Lidenb97bf3f2006-01-02 19:04:38 +0100493 */
Ying Xue247f0f32014-02-18 16:06:46 +0800494static unsigned int tipc_poll(struct file *file, struct socket *sock,
495 poll_table *wait)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100496{
Allan Stephens9b674e82008-03-26 16:48:21 -0700497 struct sock *sk = sock->sk;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400498 struct tipc_sock *tsk = tipc_sk(sk);
Allan Stephensf662c072010-08-17 11:00:06 +0000499 u32 mask = 0;
Allan Stephens9b674e82008-03-26 16:48:21 -0700500
Ying Xuef288bef2012-08-21 11:16:57 +0800501 sock_poll_wait(file, sk_sleep(sk), wait);
Allan Stephens9b674e82008-03-26 16:48:21 -0700502
Allan Stephensf662c072010-08-17 11:00:06 +0000503 switch ((int)sock->state) {
Erik Hugnec4fc2982012-10-16 16:47:06 +0200504 case SS_UNCONNECTED:
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400505 if (!tsk->port.congested)
Erik Hugnec4fc2982012-10-16 16:47:06 +0200506 mask |= POLLOUT;
507 break;
Allan Stephensf662c072010-08-17 11:00:06 +0000508 case SS_READY:
509 case SS_CONNECTED:
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400510 if (!tsk->port.congested)
Allan Stephensf662c072010-08-17 11:00:06 +0000511 mask |= POLLOUT;
512 /* fall thru' */
513 case SS_CONNECTING:
514 case SS_LISTENING:
515 if (!skb_queue_empty(&sk->sk_receive_queue))
516 mask |= (POLLIN | POLLRDNORM);
517 break;
518 case SS_DISCONNECTING:
519 mask = (POLLIN | POLLRDNORM | POLLHUP);
520 break;
521 }
Allan Stephens9b674e82008-03-26 16:48:21 -0700522
523 return mask;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100524}
525
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900526/**
Per Lidenb97bf3f2006-01-02 19:04:38 +0100527 * dest_name_check - verify user is permitted to send to specified port name
528 * @dest: destination address
529 * @m: descriptor for message to be sent
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900530 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100531 * Prevents restricted configuration commands from being issued by
532 * unauthorized users.
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900533 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100534 * Returns 0 if permission is granted, otherwise errno
535 */
Sam Ravnborg05790c62006-03-20 22:37:04 -0800536static int dest_name_check(struct sockaddr_tipc *dest, struct msghdr *m)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100537{
538 struct tipc_cfg_msg_hdr hdr;
539
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900540 if (likely(dest->addr.name.name.type >= TIPC_RESERVED_TYPES))
541 return 0;
542 if (likely(dest->addr.name.name.type == TIPC_TOP_SRV))
543 return 0;
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900544 if (likely(dest->addr.name.name.type != TIPC_CFG_SRV))
545 return -EACCES;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100546
Allan Stephens3f8dd942011-01-18 13:09:29 -0500547 if (!m->msg_iovlen || (m->msg_iov[0].iov_len < sizeof(hdr)))
548 return -EMSGSIZE;
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900549 if (copy_from_user(&hdr, m->msg_iov[0].iov_base, sizeof(hdr)))
Per Lidenb97bf3f2006-01-02 19:04:38 +0100550 return -EFAULT;
Allan Stephens70cb2342006-06-25 23:41:47 -0700551 if ((ntohs(hdr.tcm_type) & 0xC000) && (!capable(CAP_NET_ADMIN)))
Per Lidenb97bf3f2006-01-02 19:04:38 +0100552 return -EACCES;
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900553
Per Lidenb97bf3f2006-01-02 19:04:38 +0100554 return 0;
555}
556
Ying Xue3f405042014-01-17 09:50:05 +0800557static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p)
558{
559 struct sock *sk = sock->sk;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400560 struct tipc_sock *tsk = tipc_sk(sk);
Ying Xue3f405042014-01-17 09:50:05 +0800561 DEFINE_WAIT(wait);
562 int done;
563
564 do {
565 int err = sock_error(sk);
566 if (err)
567 return err;
568 if (sock->state == SS_DISCONNECTING)
569 return -EPIPE;
570 if (!*timeo_p)
571 return -EAGAIN;
572 if (signal_pending(current))
573 return sock_intr_errno(*timeo_p);
574
575 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400576 done = sk_wait_event(sk, timeo_p, !tsk->port.congested);
Ying Xue3f405042014-01-17 09:50:05 +0800577 finish_wait(sk_sleep(sk), &wait);
578 } while (!done);
579 return 0;
580}
581
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400582
Per Lidenb97bf3f2006-01-02 19:04:38 +0100583/**
Ying Xue247f0f32014-02-18 16:06:46 +0800584 * tipc_sendmsg - send message in connectionless manner
Allan Stephens0c3141e2008-04-15 00:22:02 -0700585 * @iocb: if NULL, indicates that socket lock is already held
Per Lidenb97bf3f2006-01-02 19:04:38 +0100586 * @sock: socket structure
587 * @m: message to send
Allan Stephense9024f0f2006-06-25 23:43:57 -0700588 * @total_len: length of message
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900589 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100590 * Message must have an destination specified explicitly.
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900591 * Used for SOCK_RDM and SOCK_DGRAM messages,
Per Lidenb97bf3f2006-01-02 19:04:38 +0100592 * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections.
593 * (Note: 'SYN+' is prohibited on SOCK_STREAM.)
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900594 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100595 * Returns the number of bytes sent on success, or errno otherwise
596 */
Ying Xue247f0f32014-02-18 16:06:46 +0800597static int tipc_sendmsg(struct kiocb *iocb, struct socket *sock,
598 struct msghdr *m, size_t total_len)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100599{
Allan Stephens0c3141e2008-04-15 00:22:02 -0700600 struct sock *sk = sock->sk;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400601 struct tipc_sock *tsk = tipc_sk(sk);
Jon Paul Maloy5c311422014-03-12 11:31:13 -0400602 struct tipc_port *port = &tsk->port;
Steffen Hurrle342dfc32014-01-17 22:53:15 +0100603 DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100604 int needs_conn;
Ying Xue3f405042014-01-17 09:50:05 +0800605 long timeo;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100606 int res = -EINVAL;
607
608 if (unlikely(!dest))
609 return -EDESTADDRREQ;
Allan Stephens51f9cc12006-06-25 23:49:06 -0700610 if (unlikely((m->msg_namelen < sizeof(*dest)) ||
611 (dest->family != AF_TIPC)))
Per Lidenb97bf3f2006-01-02 19:04:38 +0100612 return -EINVAL;
Ying Xue97f8b872013-01-31 21:51:47 +0100613 if (total_len > TIPC_MAX_USER_MSG_SIZE)
Allan Stephensc29c3f72010-04-20 17:58:24 -0400614 return -EMSGSIZE;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100615
Allan Stephens0c3141e2008-04-15 00:22:02 -0700616 if (iocb)
617 lock_sock(sk);
618
Per Lidenb97bf3f2006-01-02 19:04:38 +0100619 needs_conn = (sock->state != SS_READY);
620 if (unlikely(needs_conn)) {
Allan Stephens0c3141e2008-04-15 00:22:02 -0700621 if (sock->state == SS_LISTENING) {
622 res = -EPIPE;
623 goto exit;
Allan Stephens33880072006-06-25 23:44:57 -0700624 }
Allan Stephens0c3141e2008-04-15 00:22:02 -0700625 if (sock->state != SS_UNCONNECTED) {
626 res = -EISCONN;
627 goto exit;
628 }
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400629 if (tsk->port.published) {
Allan Stephens0c3141e2008-04-15 00:22:02 -0700630 res = -EOPNOTSUPP;
631 goto exit;
632 }
633 if (dest->addrtype == TIPC_ADDR_NAME) {
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400634 tsk->port.conn_type = dest->addr.name.name.type;
635 tsk->port.conn_instance = dest->addr.name.name.instance;
Allan Stephens0c3141e2008-04-15 00:22:02 -0700636 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100637
638 /* Abort any pending connection attempts (very unlikely) */
Allan Stephens0c3141e2008-04-15 00:22:02 -0700639 reject_rx_queue(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100640 }
641
Ying Xue3f405042014-01-17 09:50:05 +0800642 timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT);
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900643 do {
644 if (dest->addrtype == TIPC_ADDR_NAME) {
Allan Stephens2db99832010-12-31 18:59:33 +0000645 res = dest_name_check(dest, m);
646 if (res)
Allan Stephens0c3141e2008-04-15 00:22:02 -0700647 break;
Jon Paul Maloy5c311422014-03-12 11:31:13 -0400648 res = tipc_send2name(port,
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900649 &dest->addr.name.name,
650 dest->addr.name.domain,
Allan Stephens26896902011-04-21 10:42:07 -0500651 m->msg_iov,
652 total_len);
Allan Stephens0e659672010-12-31 18:59:32 +0000653 } else if (dest->addrtype == TIPC_ADDR_ID) {
Jon Paul Maloy5c311422014-03-12 11:31:13 -0400654 res = tipc_send2port(port,
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900655 &dest->addr.id,
Allan Stephens26896902011-04-21 10:42:07 -0500656 m->msg_iov,
657 total_len);
Allan Stephens0e659672010-12-31 18:59:32 +0000658 } else if (dest->addrtype == TIPC_ADDR_MCAST) {
Per Lidenb97bf3f2006-01-02 19:04:38 +0100659 if (needs_conn) {
660 res = -EOPNOTSUPP;
Allan Stephens0c3141e2008-04-15 00:22:02 -0700661 break;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100662 }
Allan Stephens2db99832010-12-31 18:59:33 +0000663 res = dest_name_check(dest, m);
664 if (res)
Allan Stephens0c3141e2008-04-15 00:22:02 -0700665 break;
Jon Paul Maloy5c311422014-03-12 11:31:13 -0400666 res = tipc_port_mcast_xmit(port,
Ying Xue247f0f32014-02-18 16:06:46 +0800667 &dest->addr.nameseq,
668 m->msg_iov,
669 total_len);
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900670 }
671 if (likely(res != -ELINKCONG)) {
Allan Stephensa0168922010-12-31 18:59:35 +0000672 if (needs_conn && (res >= 0))
Allan Stephens0c3141e2008-04-15 00:22:02 -0700673 sock->state = SS_CONNECTING;
Allan Stephens0c3141e2008-04-15 00:22:02 -0700674 break;
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900675 }
Ying Xue3f405042014-01-17 09:50:05 +0800676 res = tipc_wait_for_sndmsg(sock, &timeo);
677 if (res)
Allan Stephens0c3141e2008-04-15 00:22:02 -0700678 break;
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900679 } while (1);
Allan Stephens0c3141e2008-04-15 00:22:02 -0700680
681exit:
682 if (iocb)
683 release_sock(sk);
684 return res;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100685}
686
Ying Xue391a6dd2014-01-17 09:50:06 +0800687static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p)
688{
689 struct sock *sk = sock->sk;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400690 struct tipc_sock *tsk = tipc_sk(sk);
691 struct tipc_port *port = &tsk->port;
Ying Xue391a6dd2014-01-17 09:50:06 +0800692 DEFINE_WAIT(wait);
693 int done;
694
695 do {
696 int err = sock_error(sk);
697 if (err)
698 return err;
699 if (sock->state == SS_DISCONNECTING)
700 return -EPIPE;
701 else if (sock->state != SS_CONNECTED)
702 return -ENOTCONN;
703 if (!*timeo_p)
704 return -EAGAIN;
705 if (signal_pending(current))
706 return sock_intr_errno(*timeo_p);
707
708 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
709 done = sk_wait_event(sk, timeo_p,
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400710 (!port->congested || !port->connected));
Ying Xue391a6dd2014-01-17 09:50:06 +0800711 finish_wait(sk_sleep(sk), &wait);
712 } while (!done);
713 return 0;
714}
715
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900716/**
Ying Xue247f0f32014-02-18 16:06:46 +0800717 * tipc_send_packet - send a connection-oriented message
Allan Stephens0c3141e2008-04-15 00:22:02 -0700718 * @iocb: if NULL, indicates that socket lock is already held
Per Lidenb97bf3f2006-01-02 19:04:38 +0100719 * @sock: socket structure
720 * @m: message to send
Allan Stephense9024f0f2006-06-25 23:43:57 -0700721 * @total_len: length of message
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900722 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100723 * Used for SOCK_SEQPACKET messages and SOCK_STREAM data.
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900724 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100725 * Returns the number of bytes sent on success, or errno otherwise
726 */
Ying Xue247f0f32014-02-18 16:06:46 +0800727static int tipc_send_packet(struct kiocb *iocb, struct socket *sock,
728 struct msghdr *m, size_t total_len)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100729{
Allan Stephens0c3141e2008-04-15 00:22:02 -0700730 struct sock *sk = sock->sk;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400731 struct tipc_sock *tsk = tipc_sk(sk);
Steffen Hurrle342dfc32014-01-17 22:53:15 +0100732 DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
Ying Xue391a6dd2014-01-17 09:50:06 +0800733 int res = -EINVAL;
734 long timeo;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100735
736 /* Handle implied connection establishment */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100737 if (unlikely(dest))
Ying Xue247f0f32014-02-18 16:06:46 +0800738 return tipc_sendmsg(iocb, sock, m, total_len);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100739
Ying Xue97f8b872013-01-31 21:51:47 +0100740 if (total_len > TIPC_MAX_USER_MSG_SIZE)
Allan Stephensc29c3f72010-04-20 17:58:24 -0400741 return -EMSGSIZE;
742
Allan Stephens0c3141e2008-04-15 00:22:02 -0700743 if (iocb)
744 lock_sock(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100745
Ying Xue391a6dd2014-01-17 09:50:06 +0800746 if (unlikely(sock->state != SS_CONNECTED)) {
747 if (sock->state == SS_DISCONNECTING)
748 res = -EPIPE;
749 else
750 res = -ENOTCONN;
751 goto exit;
752 }
Ying Xue1d835872011-07-06 05:53:15 -0400753
Ying Xue391a6dd2014-01-17 09:50:06 +0800754 timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT);
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900755 do {
Jon Paul Maloy5c311422014-03-12 11:31:13 -0400756 res = tipc_send(&tsk->port, m->msg_iov, total_len);
Allan Stephensa0168922010-12-31 18:59:35 +0000757 if (likely(res != -ELINKCONG))
Allan Stephens0c3141e2008-04-15 00:22:02 -0700758 break;
Ying Xue391a6dd2014-01-17 09:50:06 +0800759 res = tipc_wait_for_sndpkt(sock, &timeo);
760 if (res)
Allan Stephens0c3141e2008-04-15 00:22:02 -0700761 break;
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900762 } while (1);
Ying Xue391a6dd2014-01-17 09:50:06 +0800763exit:
Allan Stephens0c3141e2008-04-15 00:22:02 -0700764 if (iocb)
765 release_sock(sk);
766 return res;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100767}
768
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900769/**
Ying Xue247f0f32014-02-18 16:06:46 +0800770 * tipc_send_stream - send stream-oriented data
Per Lidenb97bf3f2006-01-02 19:04:38 +0100771 * @iocb: (unused)
772 * @sock: socket structure
773 * @m: data to send
774 * @total_len: total length of data to be sent
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900775 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100776 * Used for SOCK_STREAM data.
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900777 *
778 * Returns the number of bytes sent on success (or partial success),
Allan Stephens1303e8f2006-06-25 23:46:50 -0700779 * or errno if no data sent
Per Lidenb97bf3f2006-01-02 19:04:38 +0100780 */
Ying Xue247f0f32014-02-18 16:06:46 +0800781static int tipc_send_stream(struct kiocb *iocb, struct socket *sock,
782 struct msghdr *m, size_t total_len)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100783{
Allan Stephens0c3141e2008-04-15 00:22:02 -0700784 struct sock *sk = sock->sk;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400785 struct tipc_sock *tsk = tipc_sk(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100786 struct msghdr my_msg;
787 struct iovec my_iov;
788 struct iovec *curr_iov;
789 int curr_iovlen;
790 char __user *curr_start;
Allan Stephens05646c92007-06-10 17:25:24 -0700791 u32 hdr_size;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100792 int curr_left;
793 int bytes_to_send;
Allan Stephens1303e8f2006-06-25 23:46:50 -0700794 int bytes_sent;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100795 int res;
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900796
Allan Stephens0c3141e2008-04-15 00:22:02 -0700797 lock_sock(sk);
798
Allan Stephens05646c92007-06-10 17:25:24 -0700799 /* Handle special cases where there is no connection */
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900800 if (unlikely(sock->state != SS_CONNECTED)) {
wangweidong3b8401f2013-12-12 09:36:40 +0800801 if (sock->state == SS_UNCONNECTED)
Ying Xue247f0f32014-02-18 16:06:46 +0800802 res = tipc_send_packet(NULL, sock, m, total_len);
wangweidongb0555972013-12-27 10:09:39 +0800803 else
804 res = sock->state == SS_DISCONNECTING ? -EPIPE : -ENOTCONN;
wangweidong3b8401f2013-12-12 09:36:40 +0800805 goto exit;
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900806 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100807
Allan Stephens0c3141e2008-04-15 00:22:02 -0700808 if (unlikely(m->msg_name)) {
809 res = -EISCONN;
810 goto exit;
811 }
Allan Stephenseb5959c2006-10-16 21:43:54 -0700812
Ying Xue97f8b872013-01-31 21:51:47 +0100813 if (total_len > (unsigned int)INT_MAX) {
Allan Stephensc29c3f72010-04-20 17:58:24 -0400814 res = -EMSGSIZE;
815 goto exit;
816 }
817
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900818 /*
Per Lidenb97bf3f2006-01-02 19:04:38 +0100819 * Send each iovec entry using one or more messages
820 *
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900821 * Note: This algorithm is good for the most likely case
Per Lidenb97bf3f2006-01-02 19:04:38 +0100822 * (i.e. one large iovec entry), but could be improved to pass sets
823 * of small iovec entries into send_packet().
824 */
Allan Stephens1303e8f2006-06-25 23:46:50 -0700825 curr_iov = m->msg_iov;
826 curr_iovlen = m->msg_iovlen;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100827 my_msg.msg_iov = &my_iov;
828 my_msg.msg_iovlen = 1;
Allan Stephenseb5959c2006-10-16 21:43:54 -0700829 my_msg.msg_flags = m->msg_flags;
830 my_msg.msg_name = NULL;
Allan Stephens1303e8f2006-06-25 23:46:50 -0700831 bytes_sent = 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100832
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400833 hdr_size = msg_hdr_sz(&tsk->port.phdr);
Allan Stephens05646c92007-06-10 17:25:24 -0700834
Per Lidenb97bf3f2006-01-02 19:04:38 +0100835 while (curr_iovlen--) {
836 curr_start = curr_iov->iov_base;
837 curr_left = curr_iov->iov_len;
838
839 while (curr_left) {
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400840 bytes_to_send = tsk->port.max_pkt - hdr_size;
Allan Stephens05646c92007-06-10 17:25:24 -0700841 if (bytes_to_send > TIPC_MAX_USER_MSG_SIZE)
842 bytes_to_send = TIPC_MAX_USER_MSG_SIZE;
843 if (curr_left < bytes_to_send)
844 bytes_to_send = curr_left;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100845 my_iov.iov_base = curr_start;
846 my_iov.iov_len = bytes_to_send;
Ying Xue247f0f32014-02-18 16:06:46 +0800847 res = tipc_send_packet(NULL, sock, &my_msg,
848 bytes_to_send);
Allan Stephens2db99832010-12-31 18:59:33 +0000849 if (res < 0) {
Allan Stephens0c3141e2008-04-15 00:22:02 -0700850 if (bytes_sent)
Allan Stephens05646c92007-06-10 17:25:24 -0700851 res = bytes_sent;
Allan Stephens0c3141e2008-04-15 00:22:02 -0700852 goto exit;
Allan Stephens1303e8f2006-06-25 23:46:50 -0700853 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100854 curr_left -= bytes_to_send;
855 curr_start += bytes_to_send;
Allan Stephens1303e8f2006-06-25 23:46:50 -0700856 bytes_sent += bytes_to_send;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100857 }
858
859 curr_iov++;
860 }
Allan Stephens0c3141e2008-04-15 00:22:02 -0700861 res = bytes_sent;
862exit:
863 release_sock(sk);
864 return res;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100865}
866
867/**
868 * auto_connect - complete connection setup to a remote port
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400869 * @tsk: tipc socket structure
Per Lidenb97bf3f2006-01-02 19:04:38 +0100870 * @msg: peer's response message
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900871 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100872 * Returns 0 on success, errno otherwise
873 */
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400874static int auto_connect(struct tipc_sock *tsk, struct tipc_msg *msg)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100875{
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400876 struct tipc_port *port = &tsk->port;
877 struct socket *sock = tsk->sk.sk_socket;
Jon Paul Maloyf9fef182014-03-12 11:31:08 -0400878 struct tipc_portid peer;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100879
Jon Paul Maloyf9fef182014-03-12 11:31:08 -0400880 peer.ref = msg_origport(msg);
881 peer.node = msg_orignode(msg);
882
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400883 __tipc_port_connect(port->ref, port, &peer);
Ying Xue584d24b2012-11-29 18:51:19 -0500884
885 if (msg_importance(msg) > TIPC_CRITICAL_IMPORTANCE)
886 return -EINVAL;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400887 msg_set_importance(&port->phdr, (u32)msg_importance(msg));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100888 sock->state = SS_CONNECTED;
889 return 0;
890}
891
892/**
893 * set_orig_addr - capture sender's address for received message
894 * @m: descriptor for message info
895 * @msg: received message header
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900896 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100897 * Note: Address is not captured if not requested by receiver.
898 */
Sam Ravnborg05790c62006-03-20 22:37:04 -0800899static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100900{
Steffen Hurrle342dfc32014-01-17 22:53:15 +0100901 DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100902
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900903 if (addr) {
Per Lidenb97bf3f2006-01-02 19:04:38 +0100904 addr->family = AF_TIPC;
905 addr->addrtype = TIPC_ADDR_ID;
Mathias Krause60085c32013-04-07 01:52:00 +0000906 memset(&addr->addr, 0, sizeof(addr->addr));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100907 addr->addr.id.ref = msg_origport(msg);
908 addr->addr.id.node = msg_orignode(msg);
Allan Stephens0e659672010-12-31 18:59:32 +0000909 addr->addr.name.domain = 0; /* could leave uninitialized */
910 addr->scope = 0; /* could leave uninitialized */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100911 m->msg_namelen = sizeof(struct sockaddr_tipc);
912 }
913}
914
915/**
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900916 * anc_data_recv - optionally capture ancillary data for received message
Per Lidenb97bf3f2006-01-02 19:04:38 +0100917 * @m: descriptor for message info
918 * @msg: received message header
919 * @tport: TIPC port associated with message
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900920 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100921 * Note: Ancillary data is not captured if not requested by receiver.
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900922 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100923 * Returns 0 if successful, otherwise errno
924 */
Sam Ravnborg05790c62006-03-20 22:37:04 -0800925static int anc_data_recv(struct msghdr *m, struct tipc_msg *msg,
Paul Gortmakerae8509c2013-06-17 10:54:47 -0400926 struct tipc_port *tport)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100927{
928 u32 anc_data[3];
929 u32 err;
930 u32 dest_type;
Allan Stephens3546c752006-06-25 23:45:24 -0700931 int has_name;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100932 int res;
933
934 if (likely(m->msg_controllen == 0))
935 return 0;
936
937 /* Optionally capture errored message object(s) */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100938 err = msg ? msg_errcode(msg) : 0;
939 if (unlikely(err)) {
940 anc_data[0] = err;
941 anc_data[1] = msg_data_sz(msg);
Allan Stephens2db99832010-12-31 18:59:33 +0000942 res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data);
943 if (res)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100944 return res;
Allan Stephens2db99832010-12-31 18:59:33 +0000945 if (anc_data[1]) {
946 res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1],
947 msg_data(msg));
948 if (res)
949 return res;
950 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100951 }
952
953 /* Optionally capture message destination object */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100954 dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG;
955 switch (dest_type) {
956 case TIPC_NAMED_MSG:
Allan Stephens3546c752006-06-25 23:45:24 -0700957 has_name = 1;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100958 anc_data[0] = msg_nametype(msg);
959 anc_data[1] = msg_namelower(msg);
960 anc_data[2] = msg_namelower(msg);
961 break;
962 case TIPC_MCAST_MSG:
Allan Stephens3546c752006-06-25 23:45:24 -0700963 has_name = 1;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100964 anc_data[0] = msg_nametype(msg);
965 anc_data[1] = msg_namelower(msg);
966 anc_data[2] = msg_nameupper(msg);
967 break;
968 case TIPC_CONN_MSG:
Allan Stephens3546c752006-06-25 23:45:24 -0700969 has_name = (tport->conn_type != 0);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100970 anc_data[0] = tport->conn_type;
971 anc_data[1] = tport->conn_instance;
972 anc_data[2] = tport->conn_instance;
973 break;
974 default:
Allan Stephens3546c752006-06-25 23:45:24 -0700975 has_name = 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100976 }
Allan Stephens2db99832010-12-31 18:59:33 +0000977 if (has_name) {
978 res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data);
979 if (res)
980 return res;
981 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100982
983 return 0;
984}
985
Ying Xue9bbb4ec2014-01-17 09:50:07 +0800986static int tipc_wait_for_rcvmsg(struct socket *sock, long timeo)
987{
988 struct sock *sk = sock->sk;
989 DEFINE_WAIT(wait);
990 int err;
991
992 for (;;) {
993 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
Ying Xuefe8e4642014-03-06 14:40:18 +0100994 if (timeo && skb_queue_empty(&sk->sk_receive_queue)) {
Ying Xue9bbb4ec2014-01-17 09:50:07 +0800995 if (sock->state == SS_DISCONNECTING) {
996 err = -ENOTCONN;
997 break;
998 }
999 release_sock(sk);
1000 timeo = schedule_timeout(timeo);
1001 lock_sock(sk);
1002 }
1003 err = 0;
1004 if (!skb_queue_empty(&sk->sk_receive_queue))
1005 break;
1006 err = sock_intr_errno(timeo);
1007 if (signal_pending(current))
1008 break;
1009 err = -EAGAIN;
1010 if (!timeo)
1011 break;
1012 }
1013 finish_wait(sk_sleep(sk), &wait);
1014 return err;
1015}
1016
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001017/**
Ying Xue247f0f32014-02-18 16:06:46 +08001018 * tipc_recvmsg - receive packet-oriented message
Per Lidenb97bf3f2006-01-02 19:04:38 +01001019 * @iocb: (unused)
1020 * @m: descriptor for message info
1021 * @buf_len: total size of user buffer area
1022 * @flags: receive flags
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001023 *
Per Lidenb97bf3f2006-01-02 19:04:38 +01001024 * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages.
1025 * If the complete message doesn't fit in user area, truncate it.
1026 *
1027 * Returns size of returned message data, errno otherwise
1028 */
Ying Xue247f0f32014-02-18 16:06:46 +08001029static int tipc_recvmsg(struct kiocb *iocb, struct socket *sock,
1030 struct msghdr *m, size_t buf_len, int flags)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001031{
Allan Stephens0c3141e2008-04-15 00:22:02 -07001032 struct sock *sk = sock->sk;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001033 struct tipc_sock *tsk = tipc_sk(sk);
1034 struct tipc_port *port = &tsk->port;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001035 struct sk_buff *buf;
1036 struct tipc_msg *msg;
Ying Xue9bbb4ec2014-01-17 09:50:07 +08001037 long timeo;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001038 unsigned int sz;
1039 u32 err;
1040 int res;
1041
Allan Stephens0c3141e2008-04-15 00:22:02 -07001042 /* Catch invalid receive requests */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001043 if (unlikely(!buf_len))
1044 return -EINVAL;
1045
Allan Stephens0c3141e2008-04-15 00:22:02 -07001046 lock_sock(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001047
Allan Stephens0c3141e2008-04-15 00:22:02 -07001048 if (unlikely(sock->state == SS_UNCONNECTED)) {
Per Lidenb97bf3f2006-01-02 19:04:38 +01001049 res = -ENOTCONN;
1050 goto exit;
1051 }
1052
Ying Xue9bbb4ec2014-01-17 09:50:07 +08001053 timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
Allan Stephens0c3141e2008-04-15 00:22:02 -07001054restart:
Per Lidenb97bf3f2006-01-02 19:04:38 +01001055
Allan Stephens0c3141e2008-04-15 00:22:02 -07001056 /* Look for a message in receive queue; wait if necessary */
Ying Xue9bbb4ec2014-01-17 09:50:07 +08001057 res = tipc_wait_for_rcvmsg(sock, timeo);
1058 if (res)
1059 goto exit;
Allan Stephens0c3141e2008-04-15 00:22:02 -07001060
1061 /* Look at first message in receive queue */
Allan Stephens0c3141e2008-04-15 00:22:02 -07001062 buf = skb_peek(&sk->sk_receive_queue);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001063 msg = buf_msg(buf);
1064 sz = msg_data_sz(msg);
1065 err = msg_errcode(msg);
1066
Per Lidenb97bf3f2006-01-02 19:04:38 +01001067 /* Discard an empty non-errored message & try again */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001068 if ((!sz) && (!err)) {
Allan Stephens0c3141e2008-04-15 00:22:02 -07001069 advance_rx_queue(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001070 goto restart;
1071 }
1072
1073 /* Capture sender's address (optional) */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001074 set_orig_addr(m, msg);
1075
1076 /* Capture ancillary data (optional) */
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001077 res = anc_data_recv(m, msg, port);
Allan Stephens0c3141e2008-04-15 00:22:02 -07001078 if (res)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001079 goto exit;
1080
1081 /* Capture message data (if valid) & compute return value (always) */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001082 if (!err) {
1083 if (unlikely(buf_len < sz)) {
1084 sz = buf_len;
1085 m->msg_flags |= MSG_TRUNC;
1086 }
Allan Stephens0232fd02011-02-21 09:45:40 -05001087 res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg),
1088 m->msg_iov, sz);
1089 if (res)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001090 goto exit;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001091 res = sz;
1092 } else {
1093 if ((sock->state == SS_READY) ||
1094 ((err == TIPC_CONN_SHUTDOWN) || m->msg_control))
1095 res = 0;
1096 else
1097 res = -ECONNRESET;
1098 }
1099
1100 /* Consume received message (optional) */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001101 if (likely(!(flags & MSG_PEEK))) {
Allan Stephens99009802008-04-15 00:06:12 -07001102 if ((sock->state != SS_READY) &&
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001103 (++port->conn_unacked >= TIPC_FLOW_CONTROL_WIN))
1104 tipc_acknowledge(port->ref, port->conn_unacked);
Allan Stephens0c3141e2008-04-15 00:22:02 -07001105 advance_rx_queue(sk);
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001106 }
Per Lidenb97bf3f2006-01-02 19:04:38 +01001107exit:
Allan Stephens0c3141e2008-04-15 00:22:02 -07001108 release_sock(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001109 return res;
1110}
1111
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001112/**
Ying Xue247f0f32014-02-18 16:06:46 +08001113 * tipc_recv_stream - receive stream-oriented data
Per Lidenb97bf3f2006-01-02 19:04:38 +01001114 * @iocb: (unused)
1115 * @m: descriptor for message info
1116 * @buf_len: total size of user buffer area
1117 * @flags: receive flags
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001118 *
1119 * Used for SOCK_STREAM messages only. If not enough data is available
Per Lidenb97bf3f2006-01-02 19:04:38 +01001120 * will optionally wait for more; never truncates data.
1121 *
1122 * Returns size of returned message data, errno otherwise
1123 */
Ying Xue247f0f32014-02-18 16:06:46 +08001124static int tipc_recv_stream(struct kiocb *iocb, struct socket *sock,
1125 struct msghdr *m, size_t buf_len, int flags)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001126{
Allan Stephens0c3141e2008-04-15 00:22:02 -07001127 struct sock *sk = sock->sk;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001128 struct tipc_sock *tsk = tipc_sk(sk);
1129 struct tipc_port *port = &tsk->port;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001130 struct sk_buff *buf;
1131 struct tipc_msg *msg;
Ying Xue9bbb4ec2014-01-17 09:50:07 +08001132 long timeo;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001133 unsigned int sz;
Florian Westphal3720d402010-08-17 11:00:04 +00001134 int sz_to_copy, target, needed;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001135 int sz_copied = 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001136 u32 err;
Allan Stephens0c3141e2008-04-15 00:22:02 -07001137 int res = 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001138
1139 /* Catch invalid receive attempts */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001140 if (unlikely(!buf_len))
1141 return -EINVAL;
1142
Allan Stephens0c3141e2008-04-15 00:22:02 -07001143 lock_sock(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001144
Ying Xue9bbb4ec2014-01-17 09:50:07 +08001145 if (unlikely(sock->state == SS_UNCONNECTED)) {
Per Lidenb97bf3f2006-01-02 19:04:38 +01001146 res = -ENOTCONN;
1147 goto exit;
1148 }
1149
Florian Westphal3720d402010-08-17 11:00:04 +00001150 target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len);
Ying Xue9bbb4ec2014-01-17 09:50:07 +08001151 timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
Paul Gortmaker617d3c72012-04-30 15:29:02 -04001152
Allan Stephens0c3141e2008-04-15 00:22:02 -07001153restart:
Allan Stephens0c3141e2008-04-15 00:22:02 -07001154 /* Look for a message in receive queue; wait if necessary */
Ying Xue9bbb4ec2014-01-17 09:50:07 +08001155 res = tipc_wait_for_rcvmsg(sock, timeo);
1156 if (res)
1157 goto exit;
Allan Stephens0c3141e2008-04-15 00:22:02 -07001158
1159 /* Look at first message in receive queue */
Allan Stephens0c3141e2008-04-15 00:22:02 -07001160 buf = skb_peek(&sk->sk_receive_queue);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001161 msg = buf_msg(buf);
1162 sz = msg_data_sz(msg);
1163 err = msg_errcode(msg);
1164
1165 /* Discard an empty non-errored message & try again */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001166 if ((!sz) && (!err)) {
Allan Stephens0c3141e2008-04-15 00:22:02 -07001167 advance_rx_queue(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001168 goto restart;
1169 }
1170
1171 /* Optionally capture sender's address & ancillary data of first msg */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001172 if (sz_copied == 0) {
1173 set_orig_addr(m, msg);
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001174 res = anc_data_recv(m, msg, port);
Allan Stephens0c3141e2008-04-15 00:22:02 -07001175 if (res)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001176 goto exit;
1177 }
1178
1179 /* Capture message data (if valid) & compute return value (always) */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001180 if (!err) {
Allan Stephens0232fd02011-02-21 09:45:40 -05001181 u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001182
Allan Stephens0232fd02011-02-21 09:45:40 -05001183 sz -= offset;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001184 needed = (buf_len - sz_copied);
1185 sz_to_copy = (sz <= needed) ? sz : needed;
Allan Stephens0232fd02011-02-21 09:45:40 -05001186
1187 res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg) + offset,
1188 m->msg_iov, sz_to_copy);
1189 if (res)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001190 goto exit;
Allan Stephens0232fd02011-02-21 09:45:40 -05001191
Per Lidenb97bf3f2006-01-02 19:04:38 +01001192 sz_copied += sz_to_copy;
1193
1194 if (sz_to_copy < sz) {
1195 if (!(flags & MSG_PEEK))
Allan Stephens0232fd02011-02-21 09:45:40 -05001196 TIPC_SKB_CB(buf)->handle =
1197 (void *)(unsigned long)(offset + sz_to_copy);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001198 goto exit;
1199 }
Per Lidenb97bf3f2006-01-02 19:04:38 +01001200 } else {
1201 if (sz_copied != 0)
1202 goto exit; /* can't add error msg to valid data */
1203
1204 if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)
1205 res = 0;
1206 else
1207 res = -ECONNRESET;
1208 }
1209
1210 /* Consume received message (optional) */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001211 if (likely(!(flags & MSG_PEEK))) {
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001212 if (unlikely(++port->conn_unacked >= TIPC_FLOW_CONTROL_WIN))
1213 tipc_acknowledge(port->ref, port->conn_unacked);
Allan Stephens0c3141e2008-04-15 00:22:02 -07001214 advance_rx_queue(sk);
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001215 }
Per Lidenb97bf3f2006-01-02 19:04:38 +01001216
1217 /* Loop around if more data is required */
Joe Perchesf64f9e72009-11-29 16:55:45 -08001218 if ((sz_copied < buf_len) && /* didn't get all requested data */
1219 (!skb_queue_empty(&sk->sk_receive_queue) ||
Florian Westphal3720d402010-08-17 11:00:04 +00001220 (sz_copied < target)) && /* and more is ready or required */
Joe Perchesf64f9e72009-11-29 16:55:45 -08001221 (!(flags & MSG_PEEK)) && /* and aren't just peeking at data */
1222 (!err)) /* and haven't reached a FIN */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001223 goto restart;
1224
1225exit:
Allan Stephens0c3141e2008-04-15 00:22:02 -07001226 release_sock(sk);
Allan Stephensa3b0a5a2006-06-25 23:48:22 -07001227 return sz_copied ? sz_copied : res;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001228}
1229
1230/**
Ying Xuef288bef2012-08-21 11:16:57 +08001231 * tipc_write_space - wake up thread if port congestion is released
1232 * @sk: socket
1233 */
1234static void tipc_write_space(struct sock *sk)
1235{
1236 struct socket_wq *wq;
1237
1238 rcu_read_lock();
1239 wq = rcu_dereference(sk->sk_wq);
1240 if (wq_has_sleeper(wq))
1241 wake_up_interruptible_sync_poll(&wq->wait, POLLOUT |
1242 POLLWRNORM | POLLWRBAND);
1243 rcu_read_unlock();
1244}
1245
1246/**
1247 * tipc_data_ready - wake up threads to indicate messages have been received
1248 * @sk: socket
1249 * @len: the length of messages
1250 */
David S. Miller676d2362014-04-11 16:15:36 -04001251static void tipc_data_ready(struct sock *sk)
Ying Xuef288bef2012-08-21 11:16:57 +08001252{
1253 struct socket_wq *wq;
1254
1255 rcu_read_lock();
1256 wq = rcu_dereference(sk->sk_wq);
1257 if (wq_has_sleeper(wq))
1258 wake_up_interruptible_sync_poll(&wq->wait, POLLIN |
1259 POLLRDNORM | POLLRDBAND);
1260 rcu_read_unlock();
1261}
1262
1263/**
Ying Xue7e6c1312012-11-29 18:39:14 -05001264 * filter_connect - Handle all incoming messages for a connection-based socket
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001265 * @tsk: TIPC socket
Ying Xue7e6c1312012-11-29 18:39:14 -05001266 * @msg: message
1267 *
1268 * Returns TIPC error status code and socket error status code
1269 * once it encounters some errors
1270 */
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001271static u32 filter_connect(struct tipc_sock *tsk, struct sk_buff **buf)
Ying Xue7e6c1312012-11-29 18:39:14 -05001272{
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001273 struct sock *sk = &tsk->sk;
1274 struct tipc_port *port = &tsk->port;
Jon Paul Maloy8826cde2014-03-12 11:31:09 -04001275 struct socket *sock = sk->sk_socket;
Ying Xue7e6c1312012-11-29 18:39:14 -05001276 struct tipc_msg *msg = buf_msg(*buf);
Jon Paul Maloy8826cde2014-03-12 11:31:09 -04001277
Ying Xue7e6c1312012-11-29 18:39:14 -05001278 u32 retval = TIPC_ERR_NO_PORT;
Ying Xue584d24b2012-11-29 18:51:19 -05001279 int res;
Ying Xue7e6c1312012-11-29 18:39:14 -05001280
1281 if (msg_mcast(msg))
1282 return retval;
1283
1284 switch ((int)sock->state) {
1285 case SS_CONNECTED:
1286 /* Accept only connection-based messages sent by peer */
Jon Paul Maloy8826cde2014-03-12 11:31:09 -04001287 if (msg_connected(msg) && tipc_port_peer_msg(port, msg)) {
Ying Xue7e6c1312012-11-29 18:39:14 -05001288 if (unlikely(msg_errcode(msg))) {
1289 sock->state = SS_DISCONNECTING;
Jon Paul Maloy8826cde2014-03-12 11:31:09 -04001290 __tipc_port_disconnect(port);
Ying Xue7e6c1312012-11-29 18:39:14 -05001291 }
1292 retval = TIPC_OK;
1293 }
1294 break;
1295 case SS_CONNECTING:
1296 /* Accept only ACK or NACK message */
Ying Xue584d24b2012-11-29 18:51:19 -05001297 if (unlikely(msg_errcode(msg))) {
1298 sock->state = SS_DISCONNECTING;
Erik Hugne2c8d8512013-08-28 09:29:58 +02001299 sk->sk_err = ECONNREFUSED;
Ying Xue7e6c1312012-11-29 18:39:14 -05001300 retval = TIPC_OK;
Ying Xue584d24b2012-11-29 18:51:19 -05001301 break;
1302 }
1303
1304 if (unlikely(!msg_connected(msg)))
1305 break;
1306
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001307 res = auto_connect(tsk, msg);
Ying Xue584d24b2012-11-29 18:51:19 -05001308 if (res) {
1309 sock->state = SS_DISCONNECTING;
Erik Hugne2c8d8512013-08-28 09:29:58 +02001310 sk->sk_err = -res;
Ying Xue584d24b2012-11-29 18:51:19 -05001311 retval = TIPC_OK;
1312 break;
1313 }
1314
1315 /* If an incoming message is an 'ACK-', it should be
1316 * discarded here because it doesn't contain useful
1317 * data. In addition, we should try to wake up
1318 * connect() routine if sleeping.
1319 */
1320 if (msg_data_sz(msg) == 0) {
1321 kfree_skb(*buf);
1322 *buf = NULL;
1323 if (waitqueue_active(sk_sleep(sk)))
1324 wake_up_interruptible(sk_sleep(sk));
1325 }
1326 retval = TIPC_OK;
Ying Xue7e6c1312012-11-29 18:39:14 -05001327 break;
1328 case SS_LISTENING:
1329 case SS_UNCONNECTED:
1330 /* Accept only SYN message */
1331 if (!msg_connected(msg) && !(msg_errcode(msg)))
1332 retval = TIPC_OK;
1333 break;
1334 case SS_DISCONNECTING:
1335 break;
1336 default:
1337 pr_err("Unknown socket state %u\n", sock->state);
1338 }
1339 return retval;
1340}
1341
1342/**
Ying Xueaba79f32013-01-20 23:30:09 +01001343 * rcvbuf_limit - get proper overload limit of socket receive queue
1344 * @sk: socket
1345 * @buf: message
1346 *
1347 * For all connection oriented messages, irrespective of importance,
1348 * the default overload value (i.e. 67MB) is set as limit.
1349 *
1350 * For all connectionless messages, by default new queue limits are
1351 * as belows:
1352 *
Ying Xuecc79dd12013-06-17 10:54:37 -04001353 * TIPC_LOW_IMPORTANCE (4 MB)
1354 * TIPC_MEDIUM_IMPORTANCE (8 MB)
1355 * TIPC_HIGH_IMPORTANCE (16 MB)
1356 * TIPC_CRITICAL_IMPORTANCE (32 MB)
Ying Xueaba79f32013-01-20 23:30:09 +01001357 *
1358 * Returns overload limit according to corresponding message importance
1359 */
1360static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *buf)
1361{
1362 struct tipc_msg *msg = buf_msg(buf);
Ying Xueaba79f32013-01-20 23:30:09 +01001363
1364 if (msg_connected(msg))
wangweidong0cee6bb2013-12-12 09:36:39 +08001365 return sysctl_tipc_rmem[2];
1366
1367 return sk->sk_rcvbuf >> TIPC_CRITICAL_IMPORTANCE <<
1368 msg_importance(msg);
Ying Xueaba79f32013-01-20 23:30:09 +01001369}
1370
1371/**
Allan Stephens0c3141e2008-04-15 00:22:02 -07001372 * filter_rcv - validate incoming message
1373 * @sk: socket
Per Lidenb97bf3f2006-01-02 19:04:38 +01001374 * @buf: message
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001375 *
Allan Stephens0c3141e2008-04-15 00:22:02 -07001376 * Enqueues message on receive queue if acceptable; optionally handles
1377 * disconnect indication for a connected socket.
1378 *
1379 * Called with socket lock already taken; port lock may also be taken.
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001380 *
Per Lidenb97bf3f2006-01-02 19:04:38 +01001381 * Returns TIPC error status code (TIPC_OK if message is not to be rejected)
1382 */
Allan Stephens0c3141e2008-04-15 00:22:02 -07001383static u32 filter_rcv(struct sock *sk, struct sk_buff *buf)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001384{
Allan Stephens0c3141e2008-04-15 00:22:02 -07001385 struct socket *sock = sk->sk_socket;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001386 struct tipc_sock *tsk = tipc_sk(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001387 struct tipc_msg *msg = buf_msg(buf);
Ying Xueaba79f32013-01-20 23:30:09 +01001388 unsigned int limit = rcvbuf_limit(sk, buf);
Ying Xue7e6c1312012-11-29 18:39:14 -05001389 u32 res = TIPC_OK;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001390
Per Lidenb97bf3f2006-01-02 19:04:38 +01001391 /* Reject message if it is wrong sort of message for socket */
Allan Stephensaad58542012-04-26 18:13:08 -04001392 if (msg_type(msg) > TIPC_DIRECT_MSG)
1393 return TIPC_ERR_NO_PORT;
Allan Stephens0c3141e2008-04-15 00:22:02 -07001394
Per Lidenb97bf3f2006-01-02 19:04:38 +01001395 if (sock->state == SS_READY) {
Allan Stephensb29f1422010-12-31 18:59:25 +00001396 if (msg_connected(msg))
Per Lidenb97bf3f2006-01-02 19:04:38 +01001397 return TIPC_ERR_NO_PORT;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001398 } else {
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001399 res = filter_connect(tsk, &buf);
Ying Xue7e6c1312012-11-29 18:39:14 -05001400 if (res != TIPC_OK || buf == NULL)
1401 return res;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001402 }
1403
1404 /* Reject message if there isn't room to queue it */
Ying Xueaba79f32013-01-20 23:30:09 +01001405 if (sk_rmem_alloc_get(sk) + buf->truesize >= limit)
1406 return TIPC_ERR_OVERLOAD;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001407
Ying Xueaba79f32013-01-20 23:30:09 +01001408 /* Enqueue message */
Ying Xue40682432013-10-18 07:23:16 +02001409 TIPC_SKB_CB(buf)->handle = NULL;
Allan Stephens0c3141e2008-04-15 00:22:02 -07001410 __skb_queue_tail(&sk->sk_receive_queue, buf);
Ying Xueaba79f32013-01-20 23:30:09 +01001411 skb_set_owner_r(buf, sk);
Allan Stephens0c3141e2008-04-15 00:22:02 -07001412
David S. Miller676d2362014-04-11 16:15:36 -04001413 sk->sk_data_ready(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001414 return TIPC_OK;
1415}
1416
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001417/**
Allan Stephens0c3141e2008-04-15 00:22:02 -07001418 * backlog_rcv - handle incoming message from backlog queue
1419 * @sk: socket
1420 * @buf: message
1421 *
1422 * Caller must hold socket lock, but not port lock.
1423 *
1424 * Returns 0
1425 */
Allan Stephens0c3141e2008-04-15 00:22:02 -07001426static int backlog_rcv(struct sock *sk, struct sk_buff *buf)
1427{
1428 u32 res;
1429
1430 res = filter_rcv(sk, buf);
1431 if (res)
1432 tipc_reject_msg(buf, res);
1433 return 0;
1434}
1435
1436/**
Jon Paul Maloy24be34b2014-03-12 11:31:10 -04001437 * tipc_sk_rcv - handle incoming message
1438 * @sk: socket receiving message
Allan Stephens0c3141e2008-04-15 00:22:02 -07001439 * @buf: message
1440 *
1441 * Called with port lock already taken.
1442 *
1443 * Returns TIPC error status code (TIPC_OK if message is not to be rejected)
1444 */
Jon Paul Maloy24be34b2014-03-12 11:31:10 -04001445u32 tipc_sk_rcv(struct sock *sk, struct sk_buff *buf)
Allan Stephens0c3141e2008-04-15 00:22:02 -07001446{
Allan Stephens0c3141e2008-04-15 00:22:02 -07001447 u32 res;
1448
1449 /*
1450 * Process message if socket is unlocked; otherwise add to backlog queue
1451 *
1452 * This code is based on sk_receive_skb(), but must be distinct from it
1453 * since a TIPC-specific filter/reject mechanism is utilized
1454 */
Allan Stephens0c3141e2008-04-15 00:22:02 -07001455 bh_lock_sock(sk);
1456 if (!sock_owned_by_user(sk)) {
1457 res = filter_rcv(sk, buf);
1458 } else {
Ying Xueaba79f32013-01-20 23:30:09 +01001459 if (sk_add_backlog(sk, buf, rcvbuf_limit(sk, buf)))
Zhu Yi53eecb12010-03-04 18:01:45 +00001460 res = TIPC_ERR_OVERLOAD;
1461 else
1462 res = TIPC_OK;
Allan Stephens0c3141e2008-04-15 00:22:02 -07001463 }
1464 bh_unlock_sock(sk);
1465
1466 return res;
1467}
1468
Ying Xue78eb3a52014-01-17 09:50:03 +08001469static int tipc_wait_for_connect(struct socket *sock, long *timeo_p)
1470{
1471 struct sock *sk = sock->sk;
1472 DEFINE_WAIT(wait);
1473 int done;
1474
1475 do {
1476 int err = sock_error(sk);
1477 if (err)
1478 return err;
1479 if (!*timeo_p)
1480 return -ETIMEDOUT;
1481 if (signal_pending(current))
1482 return sock_intr_errno(*timeo_p);
1483
1484 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1485 done = sk_wait_event(sk, timeo_p, sock->state != SS_CONNECTING);
1486 finish_wait(sk_sleep(sk), &wait);
1487 } while (!done);
1488 return 0;
1489}
1490
Per Lidenb97bf3f2006-01-02 19:04:38 +01001491/**
Ying Xue247f0f32014-02-18 16:06:46 +08001492 * tipc_connect - establish a connection to another TIPC port
Per Lidenb97bf3f2006-01-02 19:04:38 +01001493 * @sock: socket structure
1494 * @dest: socket address for destination port
1495 * @destlen: size of socket address data structure
Allan Stephens0c3141e2008-04-15 00:22:02 -07001496 * @flags: file-related flags associated with socket
Per Lidenb97bf3f2006-01-02 19:04:38 +01001497 *
1498 * Returns 0 on success, errno otherwise
1499 */
Ying Xue247f0f32014-02-18 16:06:46 +08001500static int tipc_connect(struct socket *sock, struct sockaddr *dest,
1501 int destlen, int flags)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001502{
Allan Stephens0c3141e2008-04-15 00:22:02 -07001503 struct sock *sk = sock->sk;
Allan Stephensb89741a2008-04-15 00:20:37 -07001504 struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest;
1505 struct msghdr m = {NULL,};
Ying Xue78eb3a52014-01-17 09:50:03 +08001506 long timeout = (flags & O_NONBLOCK) ? 0 : tipc_sk(sk)->conn_timeout;
1507 socket_state previous;
Allan Stephensb89741a2008-04-15 00:20:37 -07001508 int res;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001509
Allan Stephens0c3141e2008-04-15 00:22:02 -07001510 lock_sock(sk);
1511
Allan Stephensb89741a2008-04-15 00:20:37 -07001512 /* For now, TIPC does not allow use of connect() with DGRAM/RDM types */
Allan Stephens0c3141e2008-04-15 00:22:02 -07001513 if (sock->state == SS_READY) {
1514 res = -EOPNOTSUPP;
1515 goto exit;
1516 }
Per Lidenb97bf3f2006-01-02 19:04:38 +01001517
Allan Stephensb89741a2008-04-15 00:20:37 -07001518 /*
1519 * Reject connection attempt using multicast address
1520 *
1521 * Note: send_msg() validates the rest of the address fields,
1522 * so there's no need to do it here
1523 */
Allan Stephens0c3141e2008-04-15 00:22:02 -07001524 if (dst->addrtype == TIPC_ADDR_MCAST) {
1525 res = -EINVAL;
1526 goto exit;
1527 }
1528
Ying Xue78eb3a52014-01-17 09:50:03 +08001529 previous = sock->state;
Ying Xue584d24b2012-11-29 18:51:19 -05001530 switch (sock->state) {
1531 case SS_UNCONNECTED:
1532 /* Send a 'SYN-' to destination */
1533 m.msg_name = dest;
1534 m.msg_namelen = destlen;
1535
1536 /* If connect is in non-blocking case, set MSG_DONTWAIT to
1537 * indicate send_msg() is never blocked.
1538 */
1539 if (!timeout)
1540 m.msg_flags = MSG_DONTWAIT;
1541
Ying Xue247f0f32014-02-18 16:06:46 +08001542 res = tipc_sendmsg(NULL, sock, &m, 0);
Ying Xue584d24b2012-11-29 18:51:19 -05001543 if ((res < 0) && (res != -EWOULDBLOCK))
1544 goto exit;
1545
1546 /* Just entered SS_CONNECTING state; the only
1547 * difference is that return value in non-blocking
1548 * case is EINPROGRESS, rather than EALREADY.
1549 */
1550 res = -EINPROGRESS;
Ying Xue584d24b2012-11-29 18:51:19 -05001551 case SS_CONNECTING:
Ying Xue78eb3a52014-01-17 09:50:03 +08001552 if (previous == SS_CONNECTING)
1553 res = -EALREADY;
1554 if (!timeout)
1555 goto exit;
1556 timeout = msecs_to_jiffies(timeout);
1557 /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */
1558 res = tipc_wait_for_connect(sock, &timeout);
Ying Xue584d24b2012-11-29 18:51:19 -05001559 break;
1560 case SS_CONNECTED:
1561 res = -EISCONN;
1562 break;
1563 default:
1564 res = -EINVAL;
Ying Xue78eb3a52014-01-17 09:50:03 +08001565 break;
Allan Stephensb89741a2008-04-15 00:20:37 -07001566 }
Allan Stephens0c3141e2008-04-15 00:22:02 -07001567exit:
1568 release_sock(sk);
Allan Stephensb89741a2008-04-15 00:20:37 -07001569 return res;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001570}
1571
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001572/**
Ying Xue247f0f32014-02-18 16:06:46 +08001573 * tipc_listen - allow socket to listen for incoming connections
Per Lidenb97bf3f2006-01-02 19:04:38 +01001574 * @sock: socket structure
1575 * @len: (unused)
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001576 *
Per Lidenb97bf3f2006-01-02 19:04:38 +01001577 * Returns 0 on success, errno otherwise
1578 */
Ying Xue247f0f32014-02-18 16:06:46 +08001579static int tipc_listen(struct socket *sock, int len)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001580{
Allan Stephens0c3141e2008-04-15 00:22:02 -07001581 struct sock *sk = sock->sk;
1582 int res;
1583
1584 lock_sock(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001585
Ying Xue245f3d32011-07-06 06:01:13 -04001586 if (sock->state != SS_UNCONNECTED)
Allan Stephens0c3141e2008-04-15 00:22:02 -07001587 res = -EINVAL;
1588 else {
1589 sock->state = SS_LISTENING;
1590 res = 0;
1591 }
1592
1593 release_sock(sk);
1594 return res;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001595}
1596
Ying Xue6398e232014-01-17 09:50:04 +08001597static int tipc_wait_for_accept(struct socket *sock, long timeo)
1598{
1599 struct sock *sk = sock->sk;
1600 DEFINE_WAIT(wait);
1601 int err;
1602
1603 /* True wake-one mechanism for incoming connections: only
1604 * one process gets woken up, not the 'whole herd'.
1605 * Since we do not 'race & poll' for established sockets
1606 * anymore, the common case will execute the loop only once.
1607 */
1608 for (;;) {
1609 prepare_to_wait_exclusive(sk_sleep(sk), &wait,
1610 TASK_INTERRUPTIBLE);
Ying Xuefe8e4642014-03-06 14:40:18 +01001611 if (timeo && skb_queue_empty(&sk->sk_receive_queue)) {
Ying Xue6398e232014-01-17 09:50:04 +08001612 release_sock(sk);
1613 timeo = schedule_timeout(timeo);
1614 lock_sock(sk);
1615 }
1616 err = 0;
1617 if (!skb_queue_empty(&sk->sk_receive_queue))
1618 break;
1619 err = -EINVAL;
1620 if (sock->state != SS_LISTENING)
1621 break;
1622 err = sock_intr_errno(timeo);
1623 if (signal_pending(current))
1624 break;
1625 err = -EAGAIN;
1626 if (!timeo)
1627 break;
1628 }
1629 finish_wait(sk_sleep(sk), &wait);
1630 return err;
1631}
1632
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001633/**
Ying Xue247f0f32014-02-18 16:06:46 +08001634 * tipc_accept - wait for connection request
Per Lidenb97bf3f2006-01-02 19:04:38 +01001635 * @sock: listening socket
1636 * @newsock: new socket that is to be connected
1637 * @flags: file-related flags associated with socket
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001638 *
Per Lidenb97bf3f2006-01-02 19:04:38 +01001639 * Returns 0 on success, errno otherwise
1640 */
Ying Xue247f0f32014-02-18 16:06:46 +08001641static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001642{
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05001643 struct sock *new_sk, *sk = sock->sk;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001644 struct sk_buff *buf;
Jon Paul Maloy8826cde2014-03-12 11:31:09 -04001645 struct tipc_port *new_port;
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05001646 struct tipc_msg *msg;
Jon Paul Maloyf9fef182014-03-12 11:31:08 -04001647 struct tipc_portid peer;
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05001648 u32 new_ref;
Ying Xue6398e232014-01-17 09:50:04 +08001649 long timeo;
Allan Stephens0c3141e2008-04-15 00:22:02 -07001650 int res;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001651
Allan Stephens0c3141e2008-04-15 00:22:02 -07001652 lock_sock(sk);
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001653
Allan Stephens0c3141e2008-04-15 00:22:02 -07001654 if (sock->state != SS_LISTENING) {
1655 res = -EINVAL;
1656 goto exit;
1657 }
Ying Xue6398e232014-01-17 09:50:04 +08001658 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
1659 res = tipc_wait_for_accept(sock, timeo);
1660 if (res)
1661 goto exit;
Allan Stephens0c3141e2008-04-15 00:22:02 -07001662
1663 buf = skb_peek(&sk->sk_receive_queue);
1664
Ying Xuec5fa7b32013-06-17 10:54:39 -04001665 res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 1);
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05001666 if (res)
1667 goto exit;
Allan Stephens0c3141e2008-04-15 00:22:02 -07001668
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05001669 new_sk = new_sock->sk;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001670 new_port = &tipc_sk(new_sk)->port;
Jon Paul Maloy8826cde2014-03-12 11:31:09 -04001671 new_ref = new_port->ref;
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05001672 msg = buf_msg(buf);
Allan Stephens0c3141e2008-04-15 00:22:02 -07001673
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05001674 /* we lock on new_sk; but lockdep sees the lock on sk */
1675 lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING);
Allan Stephens0c3141e2008-04-15 00:22:02 -07001676
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05001677 /*
1678 * Reject any stray messages received by new socket
1679 * before the socket lock was taken (very, very unlikely)
1680 */
1681 reject_rx_queue(new_sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001682
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05001683 /* Connect new socket to it's peer */
Jon Paul Maloyf9fef182014-03-12 11:31:08 -04001684 peer.ref = msg_origport(msg);
1685 peer.node = msg_orignode(msg);
1686 tipc_port_connect(new_ref, &peer);
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05001687 new_sock->state = SS_CONNECTED;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001688
Jon Paul Maloy3b4f3022014-03-12 11:31:11 -04001689 tipc_port_set_importance(new_port, msg_importance(msg));
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05001690 if (msg_named(msg)) {
Jon Paul Maloy8826cde2014-03-12 11:31:09 -04001691 new_port->conn_type = msg_nametype(msg);
1692 new_port->conn_instance = msg_nameinst(msg);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001693 }
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05001694
1695 /*
1696 * Respond to 'SYN-' by discarding it & returning 'ACK'-.
1697 * Respond to 'SYN+' by queuing it on new socket.
1698 */
1699 if (!msg_data_sz(msg)) {
1700 struct msghdr m = {NULL,};
1701
1702 advance_rx_queue(sk);
Ying Xue247f0f32014-02-18 16:06:46 +08001703 tipc_send_packet(NULL, new_sock, &m, 0);
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05001704 } else {
1705 __skb_dequeue(&sk->sk_receive_queue);
1706 __skb_queue_head(&new_sk->sk_receive_queue, buf);
Ying Xueaba79f32013-01-20 23:30:09 +01001707 skb_set_owner_r(buf, new_sk);
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05001708 }
1709 release_sock(new_sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001710exit:
Allan Stephens0c3141e2008-04-15 00:22:02 -07001711 release_sock(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001712 return res;
1713}
1714
1715/**
Ying Xue247f0f32014-02-18 16:06:46 +08001716 * tipc_shutdown - shutdown socket connection
Per Lidenb97bf3f2006-01-02 19:04:38 +01001717 * @sock: socket structure
Allan Stephense247a8f2008-03-06 15:05:38 -08001718 * @how: direction to close (must be SHUT_RDWR)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001719 *
1720 * Terminates connection (if necessary), then purges socket's receive queue.
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001721 *
Per Lidenb97bf3f2006-01-02 19:04:38 +01001722 * Returns 0 on success, errno otherwise
1723 */
Ying Xue247f0f32014-02-18 16:06:46 +08001724static int tipc_shutdown(struct socket *sock, int how)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001725{
Allan Stephens0c3141e2008-04-15 00:22:02 -07001726 struct sock *sk = sock->sk;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001727 struct tipc_sock *tsk = tipc_sk(sk);
1728 struct tipc_port *port = &tsk->port;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001729 struct sk_buff *buf;
1730 int res;
1731
Allan Stephense247a8f2008-03-06 15:05:38 -08001732 if (how != SHUT_RDWR)
1733 return -EINVAL;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001734
Allan Stephens0c3141e2008-04-15 00:22:02 -07001735 lock_sock(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001736
1737 switch (sock->state) {
Allan Stephens0c3141e2008-04-15 00:22:02 -07001738 case SS_CONNECTING:
Per Lidenb97bf3f2006-01-02 19:04:38 +01001739 case SS_CONNECTED:
1740
Per Lidenb97bf3f2006-01-02 19:04:38 +01001741restart:
Paul Gortmaker617d3c72012-04-30 15:29:02 -04001742 /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */
Allan Stephens0c3141e2008-04-15 00:22:02 -07001743 buf = __skb_dequeue(&sk->sk_receive_queue);
1744 if (buf) {
Ying Xue40682432013-10-18 07:23:16 +02001745 if (TIPC_SKB_CB(buf)->handle != NULL) {
Allan Stephens5f6d9122011-11-04 13:24:29 -04001746 kfree_skb(buf);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001747 goto restart;
1748 }
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001749 tipc_port_disconnect(port->ref);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001750 tipc_reject_msg(buf, TIPC_CONN_SHUTDOWN);
Allan Stephens0c3141e2008-04-15 00:22:02 -07001751 } else {
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001752 tipc_port_shutdown(port->ref);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001753 }
Allan Stephens0c3141e2008-04-15 00:22:02 -07001754
1755 sock->state = SS_DISCONNECTING;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001756
1757 /* fall through */
1758
1759 case SS_DISCONNECTING:
1760
Ying Xue75031152012-10-29 09:38:15 -04001761 /* Discard any unreceived messages */
Ying Xue57467e52013-01-20 23:30:08 +01001762 __skb_queue_purge(&sk->sk_receive_queue);
Ying Xue75031152012-10-29 09:38:15 -04001763
1764 /* Wake up anyone sleeping in poll */
1765 sk->sk_state_change(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001766 res = 0;
1767 break;
1768
1769 default:
1770 res = -ENOTCONN;
1771 }
1772
Allan Stephens0c3141e2008-04-15 00:22:02 -07001773 release_sock(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001774 return res;
1775}
1776
1777/**
Ying Xue247f0f32014-02-18 16:06:46 +08001778 * tipc_setsockopt - set socket option
Per Lidenb97bf3f2006-01-02 19:04:38 +01001779 * @sock: socket structure
1780 * @lvl: option level
1781 * @opt: option identifier
1782 * @ov: pointer to new option value
1783 * @ol: length of option value
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001784 *
1785 * For stream sockets only, accepts and ignores all IPPROTO_TCP options
Per Lidenb97bf3f2006-01-02 19:04:38 +01001786 * (to ease compatibility).
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001787 *
Per Lidenb97bf3f2006-01-02 19:04:38 +01001788 * Returns 0 on success, errno otherwise
1789 */
Ying Xue247f0f32014-02-18 16:06:46 +08001790static int tipc_setsockopt(struct socket *sock, int lvl, int opt,
1791 char __user *ov, unsigned int ol)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001792{
Allan Stephens0c3141e2008-04-15 00:22:02 -07001793 struct sock *sk = sock->sk;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001794 struct tipc_sock *tsk = tipc_sk(sk);
1795 struct tipc_port *port = &tsk->port;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001796 u32 value;
1797 int res;
1798
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001799 if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM))
1800 return 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001801 if (lvl != SOL_TIPC)
1802 return -ENOPROTOOPT;
1803 if (ol < sizeof(value))
1804 return -EINVAL;
Allan Stephens2db99832010-12-31 18:59:33 +00001805 res = get_user(value, (u32 __user *)ov);
1806 if (res)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001807 return res;
1808
Allan Stephens0c3141e2008-04-15 00:22:02 -07001809 lock_sock(sk);
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001810
Per Lidenb97bf3f2006-01-02 19:04:38 +01001811 switch (opt) {
1812 case TIPC_IMPORTANCE:
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001813 tipc_port_set_importance(port, value);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001814 break;
1815 case TIPC_SRC_DROPPABLE:
1816 if (sock->type != SOCK_STREAM)
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001817 tipc_port_set_unreliable(port, value);
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001818 else
Per Lidenb97bf3f2006-01-02 19:04:38 +01001819 res = -ENOPROTOOPT;
1820 break;
1821 case TIPC_DEST_DROPPABLE:
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001822 tipc_port_set_unreturnable(port, value);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001823 break;
1824 case TIPC_CONN_TIMEOUT:
Allan Stephensa0f40f02011-05-26 13:44:34 -04001825 tipc_sk(sk)->conn_timeout = value;
Allan Stephens0c3141e2008-04-15 00:22:02 -07001826 /* no need to set "res", since already 0 at this point */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001827 break;
1828 default:
1829 res = -EINVAL;
1830 }
1831
Allan Stephens0c3141e2008-04-15 00:22:02 -07001832 release_sock(sk);
1833
Per Lidenb97bf3f2006-01-02 19:04:38 +01001834 return res;
1835}
1836
1837/**
Ying Xue247f0f32014-02-18 16:06:46 +08001838 * tipc_getsockopt - get socket option
Per Lidenb97bf3f2006-01-02 19:04:38 +01001839 * @sock: socket structure
1840 * @lvl: option level
1841 * @opt: option identifier
1842 * @ov: receptacle for option value
1843 * @ol: receptacle for length of option value
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001844 *
1845 * For stream sockets only, returns 0 length result for all IPPROTO_TCP options
Per Lidenb97bf3f2006-01-02 19:04:38 +01001846 * (to ease compatibility).
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001847 *
Per Lidenb97bf3f2006-01-02 19:04:38 +01001848 * Returns 0 on success, errno otherwise
1849 */
Ying Xue247f0f32014-02-18 16:06:46 +08001850static int tipc_getsockopt(struct socket *sock, int lvl, int opt,
1851 char __user *ov, int __user *ol)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001852{
Allan Stephens0c3141e2008-04-15 00:22:02 -07001853 struct sock *sk = sock->sk;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001854 struct tipc_sock *tsk = tipc_sk(sk);
1855 struct tipc_port *port = &tsk->port;
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001856 int len;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001857 u32 value;
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001858 int res;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001859
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001860 if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM))
1861 return put_user(0, ol);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001862 if (lvl != SOL_TIPC)
1863 return -ENOPROTOOPT;
Allan Stephens2db99832010-12-31 18:59:33 +00001864 res = get_user(len, ol);
1865 if (res)
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001866 return res;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001867
Allan Stephens0c3141e2008-04-15 00:22:02 -07001868 lock_sock(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001869
1870 switch (opt) {
1871 case TIPC_IMPORTANCE:
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001872 value = tipc_port_importance(port);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001873 break;
1874 case TIPC_SRC_DROPPABLE:
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001875 value = tipc_port_unreliable(port);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001876 break;
1877 case TIPC_DEST_DROPPABLE:
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001878 value = tipc_port_unreturnable(port);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001879 break;
1880 case TIPC_CONN_TIMEOUT:
Allan Stephensa0f40f02011-05-26 13:44:34 -04001881 value = tipc_sk(sk)->conn_timeout;
Allan Stephens0c3141e2008-04-15 00:22:02 -07001882 /* no need to set "res", since already 0 at this point */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001883 break;
Allan Stephens0e659672010-12-31 18:59:32 +00001884 case TIPC_NODE_RECVQ_DEPTH:
Ying Xue9da3d472012-11-27 06:15:27 -05001885 value = 0; /* was tipc_queue_size, now obsolete */
oscar.medina@motorola.com66506132009-06-30 03:25:39 +00001886 break;
Allan Stephens0e659672010-12-31 18:59:32 +00001887 case TIPC_SOCK_RECVQ_DEPTH:
oscar.medina@motorola.com66506132009-06-30 03:25:39 +00001888 value = skb_queue_len(&sk->sk_receive_queue);
1889 break;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001890 default:
1891 res = -EINVAL;
1892 }
1893
Allan Stephens0c3141e2008-04-15 00:22:02 -07001894 release_sock(sk);
1895
Paul Gortmaker25860c32010-12-31 18:59:31 +00001896 if (res)
1897 return res; /* "get" failed */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001898
Paul Gortmaker25860c32010-12-31 18:59:31 +00001899 if (len < sizeof(value))
1900 return -EINVAL;
1901
1902 if (copy_to_user(ov, &value, sizeof(value)))
1903 return -EFAULT;
1904
1905 return put_user(sizeof(value), ol);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001906}
1907
Ben Hutchingsae86b9e2012-07-10 10:55:35 +00001908/* Protocol switches for the various types of TIPC sockets */
1909
Florian Westphalbca65ea2008-02-07 18:18:01 -08001910static const struct proto_ops msg_ops = {
Allan Stephens0e659672010-12-31 18:59:32 +00001911 .owner = THIS_MODULE,
Per Lidenb97bf3f2006-01-02 19:04:38 +01001912 .family = AF_TIPC,
Ying Xue247f0f32014-02-18 16:06:46 +08001913 .release = tipc_release,
1914 .bind = tipc_bind,
1915 .connect = tipc_connect,
Allan Stephens5eee6a62007-06-10 17:24:55 -07001916 .socketpair = sock_no_socketpair,
Ying Xue245f3d32011-07-06 06:01:13 -04001917 .accept = sock_no_accept,
Ying Xue247f0f32014-02-18 16:06:46 +08001918 .getname = tipc_getname,
1919 .poll = tipc_poll,
Allan Stephens5eee6a62007-06-10 17:24:55 -07001920 .ioctl = sock_no_ioctl,
Ying Xue245f3d32011-07-06 06:01:13 -04001921 .listen = sock_no_listen,
Ying Xue247f0f32014-02-18 16:06:46 +08001922 .shutdown = tipc_shutdown,
1923 .setsockopt = tipc_setsockopt,
1924 .getsockopt = tipc_getsockopt,
1925 .sendmsg = tipc_sendmsg,
1926 .recvmsg = tipc_recvmsg,
YOSHIFUJI Hideaki82387452007-07-19 10:44:56 +09001927 .mmap = sock_no_mmap,
1928 .sendpage = sock_no_sendpage
Per Lidenb97bf3f2006-01-02 19:04:38 +01001929};
1930
Florian Westphalbca65ea2008-02-07 18:18:01 -08001931static const struct proto_ops packet_ops = {
Allan Stephens0e659672010-12-31 18:59:32 +00001932 .owner = THIS_MODULE,
Per Lidenb97bf3f2006-01-02 19:04:38 +01001933 .family = AF_TIPC,
Ying Xue247f0f32014-02-18 16:06:46 +08001934 .release = tipc_release,
1935 .bind = tipc_bind,
1936 .connect = tipc_connect,
Allan Stephens5eee6a62007-06-10 17:24:55 -07001937 .socketpair = sock_no_socketpair,
Ying Xue247f0f32014-02-18 16:06:46 +08001938 .accept = tipc_accept,
1939 .getname = tipc_getname,
1940 .poll = tipc_poll,
Allan Stephens5eee6a62007-06-10 17:24:55 -07001941 .ioctl = sock_no_ioctl,
Ying Xue247f0f32014-02-18 16:06:46 +08001942 .listen = tipc_listen,
1943 .shutdown = tipc_shutdown,
1944 .setsockopt = tipc_setsockopt,
1945 .getsockopt = tipc_getsockopt,
1946 .sendmsg = tipc_send_packet,
1947 .recvmsg = tipc_recvmsg,
YOSHIFUJI Hideaki82387452007-07-19 10:44:56 +09001948 .mmap = sock_no_mmap,
1949 .sendpage = sock_no_sendpage
Per Lidenb97bf3f2006-01-02 19:04:38 +01001950};
1951
Florian Westphalbca65ea2008-02-07 18:18:01 -08001952static const struct proto_ops stream_ops = {
Allan Stephens0e659672010-12-31 18:59:32 +00001953 .owner = THIS_MODULE,
Per Lidenb97bf3f2006-01-02 19:04:38 +01001954 .family = AF_TIPC,
Ying Xue247f0f32014-02-18 16:06:46 +08001955 .release = tipc_release,
1956 .bind = tipc_bind,
1957 .connect = tipc_connect,
Allan Stephens5eee6a62007-06-10 17:24:55 -07001958 .socketpair = sock_no_socketpair,
Ying Xue247f0f32014-02-18 16:06:46 +08001959 .accept = tipc_accept,
1960 .getname = tipc_getname,
1961 .poll = tipc_poll,
Allan Stephens5eee6a62007-06-10 17:24:55 -07001962 .ioctl = sock_no_ioctl,
Ying Xue247f0f32014-02-18 16:06:46 +08001963 .listen = tipc_listen,
1964 .shutdown = tipc_shutdown,
1965 .setsockopt = tipc_setsockopt,
1966 .getsockopt = tipc_getsockopt,
1967 .sendmsg = tipc_send_stream,
1968 .recvmsg = tipc_recv_stream,
YOSHIFUJI Hideaki82387452007-07-19 10:44:56 +09001969 .mmap = sock_no_mmap,
1970 .sendpage = sock_no_sendpage
Per Lidenb97bf3f2006-01-02 19:04:38 +01001971};
1972
Florian Westphalbca65ea2008-02-07 18:18:01 -08001973static const struct net_proto_family tipc_family_ops = {
Allan Stephens0e659672010-12-31 18:59:32 +00001974 .owner = THIS_MODULE,
Per Lidenb97bf3f2006-01-02 19:04:38 +01001975 .family = AF_TIPC,
Ying Xuec5fa7b32013-06-17 10:54:39 -04001976 .create = tipc_sk_create
Per Lidenb97bf3f2006-01-02 19:04:38 +01001977};
1978
1979static struct proto tipc_proto = {
1980 .name = "TIPC",
1981 .owner = THIS_MODULE,
Ying Xuecc79dd12013-06-17 10:54:37 -04001982 .obj_size = sizeof(struct tipc_sock),
1983 .sysctl_rmem = sysctl_tipc_rmem
Per Lidenb97bf3f2006-01-02 19:04:38 +01001984};
1985
Ying Xuec5fa7b32013-06-17 10:54:39 -04001986static struct proto tipc_proto_kern = {
1987 .name = "TIPC",
1988 .obj_size = sizeof(struct tipc_sock),
1989 .sysctl_rmem = sysctl_tipc_rmem
1990};
1991
Per Lidenb97bf3f2006-01-02 19:04:38 +01001992/**
Per Liden4323add2006-01-18 00:38:21 +01001993 * tipc_socket_init - initialize TIPC socket interface
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001994 *
Per Lidenb97bf3f2006-01-02 19:04:38 +01001995 * Returns 0 on success, errno otherwise
1996 */
Per Liden4323add2006-01-18 00:38:21 +01001997int tipc_socket_init(void)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001998{
1999 int res;
2000
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09002001 res = proto_register(&tipc_proto, 1);
Per Lidenb97bf3f2006-01-02 19:04:38 +01002002 if (res) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -04002003 pr_err("Failed to register TIPC protocol type\n");
Per Lidenb97bf3f2006-01-02 19:04:38 +01002004 goto out;
2005 }
2006
2007 res = sock_register(&tipc_family_ops);
2008 if (res) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -04002009 pr_err("Failed to register TIPC socket type\n");
Per Lidenb97bf3f2006-01-02 19:04:38 +01002010 proto_unregister(&tipc_proto);
2011 goto out;
2012 }
Per Lidenb97bf3f2006-01-02 19:04:38 +01002013 out:
2014 return res;
2015}
2016
2017/**
Per Liden4323add2006-01-18 00:38:21 +01002018 * tipc_socket_stop - stop TIPC socket interface
Per Lidenb97bf3f2006-01-02 19:04:38 +01002019 */
Per Liden4323add2006-01-18 00:38:21 +01002020void tipc_socket_stop(void)
Per Lidenb97bf3f2006-01-02 19:04:38 +01002021{
Per Lidenb97bf3f2006-01-02 19:04:38 +01002022 sock_unregister(tipc_family_ops.family);
2023 proto_unregister(&tipc_proto);
2024}